NOAA Technical Memorandum NWS WR-273
Climate of Flagstaff, Arizona (Revision 7)
Mike Staudenmaier, Jr.
Reginald Preston
Paul Sorenson
Justin Johndrow1
January 2014
1
NOAA National Weather Service, Weather Forecast Office, Flagstaff Arizona
United States
Department of Commerce
Penny Pritzker
Secretary
National Oceanic and
Atmospheric Administration
Dr. Kathryn Sullivan
Acting NOAA Administrator
National Weather Service
Dr. Louis Uccellini
Assistant Administrator
For Weather Services
And is approved for publication
By Science and Technology
Infusion Division,
Western Region
Andy Edman, Chief
Science and Technology Infusion Division,
Salt Lake City, UT
CLIMATE OF FLAGSTAFF, ARIZONA
Mike Staudenmaier, Jr.
Reginald Preston
Paul Sorenson
Justin Johndrow
National Weather Service Office
Flagstaff, Arizona
January 2014
Seventh Revision
CONTENTS
I.
Page
Climate of Flagstaff, Arizona ....................................................................................... 1-4
II.
Temperature Records
Daily Maximum and Minimum Temperature Extremes ................................................ 6-17
Highest and Lowest Average Temperatures by Month ................................................ 18-20
Highest and Lowest Annual Temperatures ........................................................................21
Average Number of Days Per Year with Maximum Temperatures
90 Degrees or Higher and 32 Degrees or Lower ....................................................22
Average Number of Days Per Year with Minimum Temperatures
32 and 0 Degrees or Lower ....................................................................................22
Freeze and Growing Season Data ......................................................................................22
Greatest Number of Consecutive Days with Maximum Temperatures
85 degrees or Higher ..............................................................................................22
Greatest Number of Consecutive Days with Maximum Temperatures
90 degrees or Higher ..............................................................................................23
Greatest Number of Consecutive Days with Minimum Temperatures
0 degrees or Lower .................................................................................................23
III.
Precipitation Records
Maximum and Minimum Precipitation by Months ..................................................... 25-26
Greatest Daily 24-Hour Precipitation (Midnight to Midnight) .................................... 27-29
Greatest Number of Days with 0.01 Inch and 0.10 Inch
or More, with Average Number of Days................................................................30
Greatest Number of Days with 0.25 Inch and 0.50 Inch
or More, with Average Number of Days................................................................30
Greatest Number of Consecutive Days with 0.01 Inch
and 0.25 Inch or More ............................................................................................31
Greatest Number of Consecutive Days with 0.50 Inch or More ........................................31
Greatest Number of Consecutive Days with 0.75 Inch or More ........................................32
Greatest Number of Consecutive Days without Measurable Precipitation ........................32
Excessive Storms ...............................................................................................................33
Yearly Precipitation Totals ................................................................................................34
15 Wettest and Driest Precipitation Years .........................................................................35
III.
Precipitation Records (continued)
Seasonal Snowfall Totals ...................................................................................................36
15 Snowiest and Least Snowiest Seasons ..........................................................................37
Greatest Daily 24-Hour Snowfall................................................................................. 38-40
Snowiest Calendar Days ....................................................................................................41
Greatest Consecutive Days with Measurable Snow on the Ground ..................................41
Maximum Monthly Snowfalls ..................................................................................... 42-43
Excessive Snowstorms .......................................................................................................44
Number of Days with Snowfall of 1 Inch or More ............................................................45
Number of Days with Thunderstorms ................................................................................45
Monsoon Season Statistics.................................................................................................46
IV.
Miscellaneous Information
Statistics on Sunshine, Cloudiness, and Fog......................................................................48
Normal Heating and Cooling Degree Days........................................................................49
Normal Daily Maximum, Minimum, Mean Temperatures and Average Precipitation 50-62
Sunrise and Sunset Table for Flagstaff, Arizona ...............................................................63
I. CLIMATE OF FLAGSTAFF, ARIZONA
NARRATIVE GEOGRAPHICAL AND CLIMATOLOGICAL SUMMARY
Flagstaff is majestically located on a plateau in the center of the largest stand of
Ponderosa Pine in the United States, at the base of the San Francisco Peaks (Arizona’s highest
mountains - 12,633 feet). The plateau, with an average elevation of around 7000 feet, is the
southern edge of the Colorado plateau and curves from the Grand Canyon southeastward across
mid-Arizona and then eastward into New Mexico. Flagstaff is the hub for north-south and eastwest travel across northern Arizona, and is the “gateway” to numerous recreational areas in
Arizona, including the Grand Canyon.
Flagstaff’s elevation of 7000 feet assures a variety of weather including cold winters and
mild pleasant summers, moderate humidity, and considerable diurnal temperature changes. Only
limited farming is carried on because of the shortness of the growing season, even though the
average precipitation for Flagstaff is 21.86 inches. The average date of the last occurrence of
320F in the spring is June 10 and that of the first 320F temperature in the fall is September 24.
However, the summers in Flagstaff are one of its best kept secrets with an average maximum
temperature in July of 81.20F, and an all-time record high of 970F. On average, only 3 days in
the summer have maximum temperatures of 900F or higher. Summer minimum temperatures are
cool and refreshing with temperatures often dipping into the 40s with an occasional night in the
30s.
The moderate summer heat gives way to a cooler but nonetheless pleasant fall period with
maximum temperatures generally in the 60s with minimum temperatures falling below freezing.
Winter weather typically begins by November and becomes well entrenched by December, with
frequent light to moderate snows and increasingly colder weather. By December, minimum
temperatures are generally in the teens, however afternoon maximum temperatures still average
in the 40s, due to the amount of sunshine the station receives. Because of its location with
respect to the typical jetstream and high altitude, Flagstaff is one of the ten most sunny locations
for National Weather Service offices in the United States, averaging 78 percent of the possible
sunshine throughout the year. Even with all of this winter sunshine, significant snowfall can be
expected during the winter with an average snowfall of around 102 inches per year. Between
storms, when dry high pressure builds in, winds become light and fresh snow cover is on the
ground, minimum temperatures can plummet. The all-time record low for Flagstaff is -300F.
By mid-April, winter weather usually begins to break, and although snow is not
uncommon in May, warm spells become more frequent. Snowfall has been reported as late as
June. Spring in Flagstaff is typically breezy and dry with little precipitation occurring in May
and early June.
There are two distinct periods of precipitation in Flagstaff. The first occurs during the
winter months from November through April when the jetstream can be located over the state
allowing Pacific storm systems to move overhead. The other distinct period is classified as the
summer rainy season, or “summer monsoon”. The monsoon rainy period usually occurs during
July and August when most of Arizona is subjected to widespread thunderstorm activity. These
thunderstorms are extremely variable in intensity and location and occur mainly between the
hours of 11 a.m. and 6 p.m.
Prevailing winds at Flagstaff are southwesterly most of the year. This is due to terrain
influences and short-wave weather disturbances moving across the Great Basin region of the
West. Winds of damaging force (greater than 60 mph) are rare but may occur around some of the
mountain locations during the winter and spring months. Additionally some thunderstorms may
produce local wind gusts over 60 mph for short durations.
Since there is no concentration of industry, smoke pollution is almost nonexistent, and the
air is remarkably free of contaminants of any kind, although smoke from residential fireplaces
can become a problem on some of the colder nights due to strong radiational inversions that
develop. During the winter and spring months, fog occasionally forms due to radiational cooling
from snow cover on the ground. However, this fog usually breaks up quickly by morning. In
spite of the elevation, periods of low ceilings and limited visibilities are usually of short duration.
A HISTORY OF WEATHER OBSERVATIONS AT FLAGSTAFF
The first official weather station in Flagstaff was established September 9, 1898. The
office was located at the southeast corner of Aspen Avenue and Park Street in a one-story fiveroom brick building known as the “Milligan Cottage”. The first observer was Miss Elizabeth
Renoe, who later married a young attorney who became the first United States Senator from
Arizona, Senator Henry Ashurst.
On March 15, 1912, the station was moved to Sitgreaves and Ellery Streets, which was
one-half mile southeast of the previous location. The station remained at this location until
October 29, 1919. The station was then moved to 602 North Leroux Street.
On June 1, 1943, the weather station was moved to the Federal Post Office Building in
downtown Flagstaff. A first-order weather station was then established.
On January 12, 1950, the weather station was moved to the Flagstaff Pulliam Airport,
four miles south of downtown Flagstaff. The station and the weather service office remained at
the airport until June 1994 when the National Weather Service office moved to the Camp Navajo
Army Depot in Bellemont. An automated weather station (ASOS) remains at the Flagstaff
Pulliam Airport recording the official observations for Flagstaff. The ASOS was commissioned
July 1, 1994.
2
SOME HIGHLIGHTS OF THE WEATHER RECORDS IN FLAGSTAFF
Many unusual weather events have taken place in Flagstaff since official weather
observations began on September 9, 1898. The following is a brief description of some of the
more extreme conditions recorded since then.
The all-time record high temperature for Flagstaff of 970F occurred on July 5, 1973.
Skies were clear and winds were generally light westerly, although by afternoon winds were
generally around 10 mph. The early morning temperature of 510F was very close to the normal
of 480F. The next day a weak cold front approached the state, keeping the afternoon high
temperature only at 890F.
The all-time record warmest minimum temperature for Flagstaff was broken on back to
back nights in 2002. On July 1, 2002 the mercury fell to only 67 degrees breaking the previous
record of 66 degrees set in 1949. This record was then broken again the next night when the
temperature only fell to 68 degrees. Oddly enough, the dew point temperatures were only in the
lower 40s during this period and there wasn’t any extensive cloud cover or winds to keep the
temperatures from falling rapidly. However, there was a large fire burning to the east of Flagstaff,
with some smoke in the area that may have contributed to the record warm overnight
temperatures.
The longest consecutive stretch of days with maximum temperatures of 900F or greater in
Flagstaff was 11 days. This occurred during June 21 - July 1, 1990. The highest temperature
reached during this longest stretch of warm weather was 940F.
The longest consecutive stretch of days with maximum temperatures of 850F or greater in
Flagstaff was 22 days. This occurred during June 10 - July 1, 1974.
The maximum number of days in a calendar year with temperatures of 900F or greater
was 15 set in 1974. Of note, 14 of those days occurred in June. The maximum number of days
in a year with temperatures of 850F or greater was 48 days which was also set in the warm
summer of 1974. 21 of these days occurred in June of that year.
The coldest temperature ever recorded in Flagstaff was -300F which was observed on
January 22, 1937. The maximum temperature reached that day was 120F, which was a 420F
diurnal spread.
The maximum number of consecutive days with minimum temperatures of 00F or lower
was eight. This stretch of cold weather occurred from December 27, 1966 - January 3, 1967.
The maximum number of days in a calendar year with temperatures of 00F or lower was
27 set in 1932. The maximum number of days in any month with temperatures of 00F or lower
was 17 set in the extremely cold month of January 1937. The average minimum temperature that
month was -2.90F which was about 18 degrees below normal.
Snow in Flagstaff is highly variable as well. The most snowfall ever recorded during the
winter season (October - May) was 210.0 inches in the winter of 1972-73. On the other extreme,
3
the least snowfall ever recorded at Flagstaff during the winter season was 11.2 inches which was
set in the winter of 1933-34.
The all-time record for heaviest precipitation during any calendar day at Flagstaff was
3.93 inches which was set on February 19, 1993. Interestingly enough, this precipitation all fell
in the form of rain, with temperatures remaining in the middle and upper 30s through the entire
24 hours. Another 1.18 inches of precipitation fell the next day, however temperatures fell
during the morning hours, changing the rain to snow, with a snow accumulation of 3.2 inches by
the end of the day.
February 1993 was the wettest month on record, with 10.05 inches of precipitation falling
during that period. Additionally, January 1993 was the wettest January on record with 9.55
inches of precipitation falling. Thus, almost 20 inches of precipitation (or almost the entire
normal precipitation for the year for Flagstaff) fell in a two month period of time. December
1992 was the second wettest December on record, giving a three month total from December
1992 through February 1993 of 27.38 inches which is by far the wettest three month period of
time in Flagstaff climatological history. Needless to say, this period was known for the
magnitude of flooding which occurred across the area.
The most snowfall to occur within a continuous stormy period, occurred from
December 13 - December 20, 1967, when 84.6" of snow fell. By the end of this event, 83 inches
of snow lay on the ground, essentially paralyzing the city of Flagstaff and most of northern
Arizona for over a week.
The greatest number of consecutive days without measurable precipitation was recorded
from September 24 - December 31, 1999, a total of 99 days! The greatest number of consecutive
days with measurable precipitation was 17 days set during the period of July 20 - August 5, 1968,
when a total of 3.29" of precipitation fell.
The most precipitation ever recorded in one calendar year at Flagstaff was 36.59 inches,
set during 1965. The least precipitation recorded in one calendar year at Flagstaff was 9.90
inches, set in 1942. Average annual precipitation for Flagstaff is 21.86 inches.
4
II. TEMPERATURE RECORDS
5
DAILY MAXIMUM AND MINIMUM TEMPERATURE EXTREMES
1899-2013
MONTH: January
Date
High
Max
Year
Low
Max
Year
High
Min
1
2
3
4
5
6
7
8
9
10
Year
Low
Min
Year
61
60
62
64
61
61
65
62
61
65
1981
1902
1918
1927
1948
1969
1914
2002
1996
1990
17
19
17
12
10
8
17
23
22
21
1919
1919
1949
1971
1971
1971
1913
1937
1937
1937
34
41
31
33
33
33
34
39
34
35
1934
1997
2005
1991
1991
1921
1993
1962
2005
2005
-21
-21
-19
-22
-22
-18
-17
-12
-9
-15
1919
1919
1937
1971
1910
1910
1913
1989
1937
1937
11
12
13
14
15
16
17
18
19
20
63
59
59
65
65
60
62
64
62
61
1990
2002
2000
1943
1943
1974
1971
1971
1986
1950
24
5
19
16
19
21
21
22
22
16
2013
1963
2007
2013
2007
1987
1960
1943
1937
1937
36
35
38
35
35
36
35
35
32
34
1982
1981
1957
1909
1938
1976
1914
1914
1998
1969
-23
-20
-7
-15
-12
-8
2
-13
-8
-13
-14
1913
1963
2013
2007
1937
1915
1987
1995
1943
1922
21
22
23
24
25
26
27
28
29
30
31
60
62
61
61
61
60
61
63
60
66
63
1944
1970
1970
1982
1975
1987
2003
1986
1986
1971
1971
15
12
17
15
24
22
21
20
15
24
19
1937
1937
1932
1937
1937
1979
1948
1979
1979
1916
1916
35
31
36
36
35
37
34
34
36
33
34
1969
2009
2009
2009
2013
2013
2013
1911
1911
1963
1963
-24
-30
-15
-15
-17
-15
-13
-13
-12
-19
-25
1937
1937
1937
1964
1937
1937
1979
1918
1932
1979
1916
Month
66
1971
5
1963
41
1997
-30
1937
6
DAILY MAXIMUM AND MINIMUM TEMPERATURE EXTREMES
1899-2013
MONTH: February
Date
High
Max
Year
Low
Max
Year
High
Min
Year
Low
Min
Year
1
2
3
4
5
6
7
8
9
10
60
62
64
64
67
65
66
65
64
65
2003
1976
1953
1963
1963
1963
1963
1996
1996
1951
17
12
20
23
21
7
14
22
20
21
1917
2011
1933
1955
1899
1989
1933
1929
1939
1965
40
37
34
34
34
33
36
36
37
35
1963
1935
1928
1931
1907
1978
1932
1957
1922
1922
-23
-14
-22
-16
-21
-21
-18
-17
-21
-17
1985
1922
1922
1955
1985
1899
1903
1933
1929
1933
11
12
13
14
15
16
17
18
19
20
62
58
68
64
65
70
66
65
65
65
1971
2002
1977
1957
1996
1977
1996
1977
1981
1977
21
21
22
25
25
21
27
24
25
18
1965
1905
1949
1942
1990
1910
1917
1917
1918
1955
35
32
36
35
33
35
34
36
38
41
1971
2005
2003
1977
1941
1904
1986
2005
1986
1996
-12
-16
-18
-15
-10
-3
-8
-11
-6
-11
1908
1965
1905
1949
1942
1990
1956
1942
1942
1955
21
22
23
24
25
26
27
28
29
60
64
66
66
70
71
64
65
59
1995
2002
1946
1904
1986
1986
1921
1999
2008
23
25
24
27
27
25
25
29
32
1913
1913
1969
1987
1987
1962
1996
2004
1916
42
41
40
42
41
36
36
40
33
1996
1901
1918
1904
1904
1989
1904
1938
1908
-9
-10
-6
-4
-10
-7
-12
-16
-3
1955
1955
1960
1909
1919
1977
1962
1962
1996
Month
71
1986
7
1989
42
1996
-23
1985
7
DAILY MAXIMUM AND MINIMUM TEMPERATURE EXTREMES
1899-2013
MONTH: March
Date
High
Max
Year
Low
Max
Year
High
Min
1
2
3
4
5
6
7
8
9
10
Year
Low
Min
Year
67
66
66
68
68
68
66
67
70
70
2009
2009
1910
1910
1910
1910
1972
1989
1989
1989
21
24
24
23
32
29
26
28
30
25
1971
1951
1966
1969
1976
1969
1969
1969
2013
1969
37
36
39
35
37
36
38
32
40
40
1920
1974
1967
1995
1995
1918
2002
1975
1943
1985
-10
-1
-9
-16
-5
-2
-1
-4
0
-9
1997
1971
1915
1966
1948
1935
1945
1969
1964
1958
11
12
13
14
15
16
17
18
19
20
69
72
70
69
72
72
73
68
71
72
1900
1900
2007
2007
2007
2007
2007
2004
1907
2004
25
25
27
25
29
29
33
32
30
30
2006
1956
1962
1969
1917
2008
1963
1924
2012
1955
40
38
40
39
35
39
37
33
36
38
1918
1938
1989
1984
1943
1914
1996
1974
1912
1904
-5
-1
-9
-4
-3
-1
3
-1
1
-1
1948
1917
1962
1990
1962
1969
1991
1954
1963
1935
21
22
23
24
25
26
27
28
29
30
31
70
68
67
70
72
73
70
68
70
70
73
2004
2004
1990
1956
1988
1988
1986
1971
1934
1971
1966
28
28
30
28
24
32
21
26
27
33
35
2000
1952
1936
1929
1913
1950
1975
1975
1998
1998
1949
42
37
36
37
39
37
40
39
38
39
41
1916
1929
2002
1943
1899
1971
2008
1967
2002
1903
1903
5
-1
-1
0
1
-8
-1
-7
10
1
3
1948
1952
1973
1904
1913
1902
1975
1975
1944
1998
1912
Month
73
2007
21
1975
42
1916
-16
1966
8
DAILY MAXIMUM AND MINIMUM TEMPERATURE EXTREMES
1899-2013
MONTH: April
Date
High
Max
Year
Low
Max
Year
High
Min
Year
Low
Min
Year
1
2
3
4
5
6
7
8
9
10
74
72
71
74
75
75
80
78
75
74
2011
1966
1961
1961
1959
1989
1989
1989
1989
1989
31
29
30
27
30
34
28
30
32
31
1999
1999
1999
1999
1921
1929
1975
1975
1943
1979
40
42
40
39
40
40
40
41
40
42
1986
2001
2001
1909
1919
1946
1931
2007
1962
1948
2
-2
8
5
8
4
10
14
9
7
1970
1975
1980
1977
1958
1922
1922
1999
1953
2011
11
12
13
14
15
16
17
18
19
20
75
75
75
75
76
77
77
79
77
78
1907
1904
1962
1937
1948
1948
1946
1989
1989
1989
29
28
36
33
33
30
33
32
29
33
1927
1967
1912
1938
1998
1976
1995
1995
1933
1995
47
44
40
42
43
43
43
46
51
45
1989
1982
1988
2013
2008
1937
1964
1981
2001
1925
10
7
0
5
11
13
15
15
10
8
1945
1953
1965
1972
1965
1995
2009
2013
1917
1966
21
22
23
24
25
26
27
28
29
30
78
76
77
77
78
79
77
80
78
78
1989
1949
1949
1949
1996
1996
2000
1992
1992
1981
34
30
36
41
38
34
37
30
35
34
1932
1925
1925
2005
1994
1985
1932
1970
1942
1915
44
46
44
47
45
45
44
49
51
48
1989
1930
1981
1943
1959
1917
1946
1981
1981
1995
12
11
14
10
13
17
10
13
7
10
1972
1963
1963
1900
1961
1984
1984
1970
1970
1967
Month
80
1992
27
1999
51
2001
-2
1975
9
DAILY MAXIMUM AND MINIMUM TEMPERATURE EXTREMES
1899-2013
MONTH: May
Date
High
Max
Year
Low
Max
Year
High
Min
1
2
3
4
5
6
7
8
9
10
Year
Low
Min
Year
80
84
88
88
86
82
81
85
81
82
1947
1947
1947
1947
1947
1947
1989
1989
1934
1934
27
33
37
38
38
38
38
36
38
34
1915
1915
1905
1905
1975
1995
1964
1930
1922
1922
44
46
46
44
45
48
44
48
46
53
1981
2009
2007
1947
1992
2000
1934
1934
1989
2000
17
13
7
18
18
14
15
17
14
19
1972
1915
1915
1915
1950
1975
1938
1965
1930
1953
11
12
13
14
15
16
17
18
19
20
86
86
82
83
81
80
82
82
85
84
1996
1996
1984
1938
1937
1970
2009
1970
2008
2008
39
43
42
41
45
46
46
43
37
44
1933
1982
1998
1977
1957
1953
1962
2011
1902
1917
47
50
48
47
50
51
48
47
56
52
2004
1934
1999
2003
1938
1996
1974
1976
1996
1901
16
20
18
21
20
16
20
21
20
18
1933
1983
1953
1942
1968
1955
1943
1977
1971
1899
21
22
23
24
25
26
27
28
29
30
31
82
85
85
83
84
87
87
86
86
88
89
2005
1984
2000
1983
1951
1951
1974
2000
2000
2002
2002
42
50
43
41
47
52
51
51
39
49
49
1975
2008
2008
1965
1965
1917
1929
1953
1971
1988
1917
50
50
48
47
54
53
50
51
50
51
51
2009
2010
2009
2000
1951
1942
2006
1925
1928
1939
2003
21
21
23
23
18
19
23
24
22
18
23
1974
1972
1927
1909
1980
1916
1916
1929
1918
1918
1988
Month
89
2002
27
1915
56
1996
7
1915
10
DAILY MAXIMUM AND MINIMUM TEMPERATURE EXTREMES
1899-2013
MONTH: June
Date
High
Max
Year
Low
Max
Year
High
Min
Year
Low
Min
Year
1
2
3
4
5
6
7
8
9
10
88
86
86
89
88
90
89
91
90
87
1977
1977
1996
1990
2010
2010
1985
2013
2013
1910
48
44
53
46
56
54
58
49
55
49
1991
1899
1925
1915
1932
1934
1941
1907
1965
1957
52
54
51
53
53
53
59
55
53
56
2002
1910
1960
2006
2006
2006
2006
1981
1990
2010
24
22
23
23
25
28
24
24
24
28
1923
1955
1971
1908
1943
1971
1954
1950
1950
1998
11
12
13
14
15
16
17
18
19
20
90
91
92
92
92
92
92
92
92
92
1918
1918
1974
1974
1974
1940
1940
1940
1936
1936
57
49
50
60
57
56
54
60
64
60
1928
1927
1955
1901
1997
1995
1995
1979
1975
1923
57
53
57
57
55
54
57
54
54
57
1911
1906
1959
2006
1961
1918
1949
1988
1961
1922
26
27
30
25
28
24
23
24
25
30
1954
1976
1976
2001
2001
1907
1923
1995
1979
2011
21
22
23
24
25
26
27
28
29
30
93
94
93
94
95
96
94
96
93
92
1936
1954
1974
1974
1970
1970
1974
2013
1990
1990
53
66
66
66
68
63
63
58
69
69
1947
1912
2000
1934
1969
1965
1906
1988
1938
1911
57
59
59
59
64
58
62
60
61
65
1918
1971
1958
1954
1902
1981
1980
1931
1961
1990
28
31
31
32
30
26
26
30
30
31
1975
1947
1948
1975
1965
1975
1965
1965
1913
1913
Month
96
2013
44
1899
65
1990
22
1955
11
DAILY MAXIMUM AND MINIMUM TEMPERATURE EXTREMES
1899- 2013
MONTH: July
Date
High
Max
Year
Low
Max
Year
High
Min
1
2
3
4
5
6
7
8
9
10
Year
Low
Min
Year
92
92
93
96
97
96
92
92
94
94
2013
1969
2007
2007
1973
1989
1905
2002
2003
2003
58
72
62
66
66
66
66
66
68
66
1911
1938
1912
1912
1952
1968
1982
1950
1914
1930
67
68
61
61
60
62
64
62
60
59
2002
2002
1973
2013
1957
1996
1951
1951
1985
2010
33
34
34
32
32
35
32
32
34
37
2004
1997
1997
1912
1955
1978
1955
1955
1926
1926
11
12
13
14
15
16
17
18
19
20
92
94
94
92
92
92
93
93
92
91
2003
2002
1972
1902
1970
1961
2009
2005
1989
1939
66
62
67
64
67
70
64
68
68
68
1999
1918
1912
1910
1919
2013
1902
1919
1994
1991
62
62
65
61
60
62
62
60
62
63
1958
1940
1935
2002
1903
1961
1988
1936
2009
1901
40
39
35
38
37
37
40
42
34
42
1979
1952
1904
1962
2011
2001
1904
1940
1987
1940
21
22
23
24
25
26
27
28
29
30
31
92
92
92
91
92
92
93
94
92
92
91
1937
1996
1996
1937
1931
1935
1947
1995
2002
1943
1977
61
65
66
64
62
65
68
64
64
66
67
1986
1913
1915
1955
1955
1912
1912
1987
1905
1921
1921
62
63
66
60
61
61
61
60
61
60
61
1964
1996
1949
2011
1929
1943
2003
2006
1947
2010
1901
38
38
37
39
41
40
36
36
37
40
43
1924
1995
1987
1995
1913
1913
1913
1913
1913
1913
1997
Month
97
1973
58
1911
68
2002
32
1955
12
DAILY MAXIMUM AND MINIMUM TEMPERATURE EXTREMES
1899-2013
MONTH: August
Date
High
Max
Year
Low
Max
Year
High
Min
1
2
3
4
5
6
7
8
9
10
Year
Low
Min
Year
92
93
91
91
90
90
92
90
89
89
1977
1902
1994
1994
1944
1983
1978
1980
1980
2002
60
65
66
66
68
62
64
67
64
66
1919
2010
1907
2006
1931
2013
2010
1930
1918
1981
60
63
61
61
65
57
62
60
58
59
1980
2000
1980
1901
1903
1981
1903
1965
1970
1940
42
43
37
35
35
36
39
35
35
40
1915
1976
1956
1956
1976
1953
1991
2009
2009
2009
11
12
13
14
15
16
17
18
19
20
91
92
90
89
88
89
88
87
88
90
1980
1944
2002
2002
1962
1939
2002
2002
1973
2009
65
62
66
63
61
65
67
65
65
67
1918
1979
1916
1999
1961
1947
1979
1979
1979
1920
57
60
60
61
59
58
57
57
57
58
2006
2002
1980
1901
1980
1963
1945
2012
2002
2002
36
36
39
33
33
37
38
36
35
35
1900
1999
1999
1976
1968
1968
1979
1975
1979
1979
21
22
23
24
25
26
27
28
29
30
31
90
88
90
91
88
88
88
89
91
90
89
2009
1938
1985
1985
1985
1974
1944
1948
1948
1948
1950
64
58
53
64
64
64
62
58
57
63
63
1921
1992
1992
1986
2013
1972
1993
1951
1951
1909
1966
62
60
58
57
57
59
57
56
57
57
56
1928
2010
2007
1944
1988
2011
1937
1967
2010
1929
2012
33
32
24
30
36
37
36
33
37
36
35
1979
1968
1968
1968
2002
1989
1978
1920
1956
1975
1957
Month
93
1902
53
1992
65
1903
24
1968
13
DAILY MAXIMUM AND MINIMUM TEMPERATURE EXTREMES
1898-2013
MONTH: September
Date
High
Max
Year
Low
Max
Year
High
Min
1
2
3
4
5
6
7
8
9
10
Year
Low
Min
Year
91
91
91
90
89
87
89
88
87
87
1948
1948
1948
1945
1945
1977
1977
1977
1977
1990
63
64
62
63
59
55
62
61
58
63
1913
1940
1961
1936
1939
1975
1975
1908
2013
2013
56
55
56
57
56
56
55
57
55
56
1995
1936
2004
1998
1980
2011
1903
1919
2003
1939
33
35
34
27
31
33
35
33
31
28
1962
1953
1973
1961
1961
1985
1970
1935
2001
1912
11
12
13
14
15
16
17
18
19
20
88
88
89
88
87
88
88
86
84
83
1990
1990
1990
2000
2000
2000
1956
1956
1956
2000
59
56
56
57
53
59
49
46
51
54
2012
1927
1927
1911
1906
1996
1923
1965
1965
1965
54
54
55
57
52
60
56
54
53
53
1952
1914
1970
1938
1997
1929
1929
1942
1992
1939
30
25
26
29
26
28
27
27
25
23
1986
1985
1952
1988
1903
1971
1903
2006
1971
1971
21
22
23
24
25
26
27
28
29
30
84
83
86
85
85
84
83
83
83
83
1943
1949
1944
1947
1947
1899
2009
2010
2010
2010
57
53
51
41
46
53
52
51
48
54
2004
1941
1986
1986
1986
1913
1936
1945
2005
1971
56
53
56
51
54
50
49
52
50
51
1928
2000
1931
1939
1929
1926
1977
1911
1911
1944
23
20
25
25
24
22
23
21
22
24
1955
1912
1970
1918
1959
1934
1900
1900
1902
1907
Month
91
1948
41
1986
60
1929
20
1912
14
DAILY MAXIMUM AND MINIMUM TEMPERATURE EXTREMES
1898- 2013
MONTH: October
Date
High
Max
Year
Low
Max
Year
High
Min
1
2
3
4
5
6
7
8
9
10
Year
Low
Min
Year
85
82
83
83
80
81
80
80
81
81
1980
1991
1980
1947
1991
1987
1965
1980
1996
1996
41
45
46
49
40
42
47
41
41
44
1959
1959
1908
1916
1912
1912
2011
1939
1961
1960
53
49
50
50
48
50
47
52
45
49
1981
1951
1989
2007
2007
1972
1923
1926
1988
2003
20
18
21
15
14
18
19
21
20
20
2009
1971
1902
1908
1969
1912
2007
1900
1970
1973
11
12
13
14
15
16
17
18
19
20
80
83
79
78
78
78
78
78
77
77
1965
1950
1950
1991
1991
1991
1973
1921
2003
2003
42
39
41
39
38
38
31
33
38
32
1969
1947
1920
1928
1960
1994
1971
1908
1920
1920
47
46
46
46
43
44
44
45
44
43
1981
1987
1991
1944
1938
1972
2004
1972
1979
1951
19
9
12
18
19
13
18
10
6
4
1920
1969
1969
1975
1966
1984
1998
1971
1971
1949
21
22
23
24
25
26
27
28
29
30
31
75
76
76
79
78
75
75
74
72
72
70
2003
2003
2003
1959
1959
1959
2008
1950
2008
1934
1999
37
32
38
42
37
30
36
32
31
32
31
1920
1906
1920
1919
1971
1996
1996
2009
1971
1961
1972
46
43
45
43
43
43
45
46
40
42
42
1901
2001
1944
1960
2011
1927
1927
1981
1992
2003
2003
5
9
10
9
11
14
10
13
9
-2
7
1949
1906
1906
1975
1975
1972
1970
1954
1971
1971
1935
Month
85
1980
30
1996
53
1981
-2
1971
15
DAILY MAXIMUM AND MINIMUM TEMPERATURE EXTREMES
1898- 2013
MONTH: November
Date
High
Max
Year
Low
Max
Year
High
Min
1
2
3
4
5
6
7
8
9
10
Year
Low
Min
Year
73
73
74
73
70
72
71
74
71
71
1916
1977
1977
1975
1976
1934
1934
1973
1973
1973
35
32
32
32
35
33
32
35
35
33
1956
1946
1936
1922
1925
2011
2011
1919
1966
2000
41
41
41
40
41
41
39
44
42
41
2003
1973
1987
2001
1960
1960
1905
1931
2002
1991
11
10
8
-1
1
7
8
7
3
5
1943
1956
1922
1922
1922
1935
1947
2011
1898
1946
11
12
13
14
15
16
17
18
19
20
73
70
72
70
70
70
67
68
69
71
1973
1967
1967
1967
1999
1981
2007
1898
1949
1976
31
30
22
30
24
21
22
25
22
22
2000
1972
1916
1985
1964
1958
1958
1969
1994
1979
40
44
43
39
39
39
36
38
40
35
1991
2009
1983
1962
2008
2008
1982
1913
1950
2011
7
3
-3
-5
2
-1
-10
-13
-6
-5
1950
1898
2000
1985
1985
1964
1964
1958
1985
1964
21
22
23
24
25
26
27
28
29
30
70
68
69
68
70
70
68
68
68
66
1950
1903
1954
1970
1949
1977
1949
1980
1949
1995
28
22
25
20
24
26
25
26
24
25
1979
1931
1931
1931
1931
1918
1976
1999
1975
1991
41
41
41
42
38
35
33
30
34
39
1966
1919
1965
1965
1919
1958
2008
2006
1954
2007
-5
-2
-4
-7
-8
-8
-5
-3
-8
-4
1979
1931
1931
1902
1906
1906
1984
1905
1905
2010
Month
74
1977
20
1931
44
2009
-13
1958
16
DAILY MAXIMUM AND MINIMUM TEMPERATURE EXTREMES
1898-2013
MONTH: December
Date
High
Max
Year
Low
Max
Year
High
Min
Year
Low
Min
Year
1
2
3
4
5
6
7
8
9
10
66
62
67
67
67
62
66
62
62
65
2008
1946
1977
1965
1989
1977
1958
1976
1977
1939
24
27
27
26
21
19
10
12
19
23
1991
1913
1913
1909
2011
1960
1978
1978
1951
1898
36
36
37
37
37
42
34
35
32
36
1954
1906
1926
1926
1921
1966
2007
1957
1965
1996
-7
-5
-2
-4
-1
-6
-19
-23
-9
-10
1905
1991
1968
1955
1953
1951
1978
1978
2013
2013
11
12
13
14
15
16
17
18
19
20
68
64
67
66
63
63
65
65
62
61
1950
1921
2010
1946
1929
1958
1980
1901
1958
1917
18
26
17
20
22
21
22
22
22
22
1949
1972
1967
1967
1971
1971
1967
1924
1924
1967
36
33
39
36
36
38
32
32
37
38
1996
1937
1995
1934
2010
1957
1929
2010
2010
2010
-11
-16
-19
-14
-14
-18
-14
-14
-14
-12
1961
1961
1931
1972
1931
1971
1928
1908
1924
1924
21
22
23
24
25
26
27
28
29
30
31
61
64
63
61
67
63
67
61
62
62
62
1969
1901
1901
1933
1980
1980
1980
1980
1945
1917
1945
14
21
16
17
20
19
18
25
22
21
17
1990
1990
1990
1974
1987
1916
1916
1988
1966
1966
2010
33
33
33
36
37
34
36
35
37
34
36
2010
2010
1955
1983
1971
1923
1983
1992
1980
1977
1909
-6
-16
-23
-17
-14
-16
-14
-12
-13
-16
-16
1967
1968
1990
1974
1926
1924
1926
1966
1988
1911
1911
Month
68
1950
10
1978
42
1966
-23
1990
17
HIGHEST AND LOWEST MONTHLY AVERAGE TEMPERATURES
(September 1898 - December 2013)
Highest Monthly
Average Temperature
Lowest Monthly
Average Temperature
Month
Normal*
Temp
Year
Temp
Year
JANUARY
29.9
37.1
37.0
36.2
35.0
34.4
2003
1986
1981
1953
1900
12.7
19.7
19.8
21.0
21.3
1937
1949
1932
1913
1922
FEBRUARY
32.1
38.2
38.0
37.9
37.4
37.2
1947
1904
1907
1934
1995
19.5
20.4
20.6
22.0
22.5
1939
1933
1919
1903
1955
MARCH
37.0
44.9
41.8
41.1
40.9
40.8
1934
1989
1910
1900
1947
26.8
27.3
28.1
28.6
29.0
1973
1969
1962
1952
1917
APRIL
43.3
50.4
49.0
48.5
48.4
47.9
1989
1992
1981
1946
1949
36.2
36.9
37.2
37.4
37.5
1975
1983
1998
1970
1999
MAY
51.6
56.8
55.6
55.4
55.3
55.3
1984
1934
2000
2001
1947
44.6
44.9
45.1
45.3
45.4
1917
1953
1915
1908
1930
JUNE
59.9
66.5
66.1
64.7
64.4
63.8
1974
1981
1918
1990
1940
53.0
54.2
54.7
55.0
55.1
1965
1907
1923
1998
1995
*Monthly normals based on climatological normals 1981-2010.
18
HIGHEST AND LOWEST MONTHLY AVERAGE TEMPERATURES
(September 1898 - December 2013)
Highest Monthly
Average Temperature
Lowest Monthly
Average Temperature
Month
Normal*
Temp
Year
Temp
Year
JULY
66.1
69.3
69.0
68.7
68.4
68.4
1901
1980
1931
1996
1942
61.1
61.7
62.6
62.7
62.7
1912
1955
1911
1914
1913
AUGUST
64.2
67.5
67.2
66.8
66.7
66.5
1944
1945
1995
1939
1991
59.5
60.5
60.6
60.7
60.8
1968
1979
1916
1906
1956
SEPTEMBER
57.4
62.1
61.9
61.5
60.7
60.7
1947
1933
1956
1983
1949
52.3
52.8
53.0
53.0
53.1
1912
1900
1986
1971
1985
OCTOBER
46.8
52.5
52.1
51.2
51.1
50.9
1988
1950
1964
1952
1933
38.6
40.4
41.2
42.0
42.4
1971
1969
1908
1919
1984
NOVEMBER
36.7
44.9
42.3
41.8
41.8
41.5
1949
1995
1981
1942
1927
29.6
30.4
30.7
31.2
31.3
1972
1952
2000
1979
1964
DECEMBER
29.6
39.8
37.6
37.0
36.5
36.4
1980
1977
1939
1958
1981
21.9
21.9
22.0
22.1
22.2
1972
1932
1911
1909
1905
*Monthly normals based on climatological normals 1981-2010.
19
! Author Note: Due to the fact that weather stations were often moved, especially in the early
days of the National Weather Service, some records are more representative than others. Even
though all temperature and precipitation observations are valid for their particular locations,
some locations have proven to be more representative of the general surrounding area than
others. In the Flagstaff climatology, there are two periods of observations which appear to be not
as representative, due to their locations.
The first of these periods is from March 15, 1912- October 29, 1919 when the observations were
taken near the intersection of Sitgreaves and Ellery Streets. This location appears to have been a
cold location, with numerous record lows occurring here. When compared to other locations in
Arizona during this same period of time, this unusual cold tendency appears to be due to
instrument error, or to improper siting. You will note many daily, monthly, and yearly cold
records occurring during the 1912-1919 period.
The other period of suspect climate information is during the period from June 1, 1943 January 11, 1950 when the observations were being recorded at the old Flagstaff post office,
located downtown. Again, due to improper siting of the instruments on the post office roof, the
temperatures occurring at this location appear to be unnaturally too warm when compared to
surrounding stations. You will note many daily, monthly, and yearly warm records occurring
during the 1943-1950 period.
With time, these biased records will be overwritten by new records, however until that happens,
data from these two periods of record should be viewed with respect to their siting.
20
HIGHEST AND LOWEST ANNUAL TEMPERATURE
(1899-2013)
Highest Annual Average
Lowest Annual Average
Temp
Year
Temp
Year
49.5
1981
42.9
1913!
48.9
1934
43.0
1915!
48.1
1943!
43.4
1979
48.1
1940
43.4
1912!
48.0
2012
43.6
1971
47.9
2003
43.6
1919
47.9
1946
43.9
1972
47.8
1989
43.9
1955
47.7
1996
43.9
1917!
47.7
1977
43.9
1908
Average Annual
Temperature*
46.3
* Averages based on climatological normals 1981-2010.
! These years should be viewed with caution due to suspect observations.
21
AVERAGE NUMBER OF DAYS PER YEAR WITH MAXIMUM TEMPERATURES
90 DEGREES OR HIGHER AND 32 DEGREES OR LOWER
(1981-2010)
90 Degrees or higher...............2 days
32 Degrees or lower……..….11 days
AVERAGE NUMBER OF DAYS PER YEAR WITH MINIMUM TEMPERATURES
OF 32 DEGREES OR LOWER AND 0 DEGREES OR LOWER
(1981-2010)
32 Degrees or lower................197 days
0 degrees or lower......................4 days
FREEZE AND GROWING SEASON DATA
The longest growing season on record.................153 days in 2009*
The shortest growing season on record..................73 days in 1968*
Average growing season.....................................................114 days
Average date of the last spring frost (32 degrees)................June 10
Average date of the first fall frost (32 degrees)..........September 24
Average date of the last spring freeze (28 degrees).............May 21
Average date of the first fall freeze (28 degrees)...........October 9
* Based on the last day of 32 degrees in the spring and the first days of 32 degrees in the fall.
GREATEST NUMBER OF CONSECUTIVE DAYS WITH
MAXIMUM TEMPERATURES
85 DEGREES OR HIGHER
(September 1898 - July 2012)
Days
Date
22
June 10 - July 1, 1974
20
July 17 - Aug 5, 2000
15
July 3 – July 17, 2003
15
July 24 - Aug 7, 1995
15
July 5 - July 19, 1901
14
June 18 - July 1, 1990
14
June 24 - July 7, 1973
13
July 27 - Aug 8, 1978
13
June 19 - July 1, 1929
Only periods with 13 or more days are tabulated.
22
GREATEST NUMBER OF CONSECUTIVE DAYS WITH
MAXIMUM TEMPERATURES
90 DEGREES OR HIGHER
(September 1898 - July 2002)
Days
11
6
5
5
5
4
4
4
4
4
4
4
4
4
4
4
4
4
Date
June 21 - July 1, 1990
July 3 - July 8, 1989
July 1 – July 5, 2007
July 9 – July 13, 2003
June 26 - June 30, 1974
July 12 – July 15, 2005
July 26 - July 29, 1995
June 27 - June 30, 1980
June 21 - June 24, 1974
June 12 - June 15, 1974
July 2 - July 5, 1973
July 12 - July 15, 1972
June 24 - June 27, 1970
July 14 - July 17, 1948
July 26 - July 29, 1947
July 30 - Aug 2, 1938
July 23 - July 26, 1931
June 20 - June 23, 1929
Only periods with 4 or more days are tabulated.
GREATEST NUMBER OF CONSECUTIVE DAYS WITH
MINIMUM TEMPERATURES
0 DEGREES OR LOWER
(September 1898 - October 2013)
Days
Date
8
Dec 27,1966 - Jan 3, 1967
8
Dec 31, 1918 - Jan 7, 1919
7
Dec 15, 1928 - Dec 21, 1928
7
Dec 23, 1926 - Dec 29, 1926
6
Dec 22, 1990 - Dec 27, 1990
6
Jan 3, 1971 - Jan 8, 1971
6
Jan 11, 1963 - Jan 16, 1963
6
Jan 1, 1960 - Jan 6, 1960
6
Jan 21, 1937 - Jan 26, 1937
6
Dec 16, 1932 - Dec 21, 1932
6
Dec 24, 1909 - Dec 29, 1909
6
Feb 4, 1903 - Feb 9, 1903
6
Dec 30, 1911 - Jan 5, 1912
Only periods with 6 or more days are tabulated.
23
III. PRECIPITATION RECORDS
24
MAXIMUM AND MINIMUM PRECIPITATION BY MONTHS
WITH YEAR OF OCCURRENCE
(September 1898 - December 2013)
Maximum Monthly
Precipitation
Minimum Monthly
Precipitation
Normal*
Amount
Year
Amount
Year
JANUARY
2.05"
9.55"
8.16"
7.21"
6.58"
6.52"
1993
1916
1949
2005
1980
0.00"
0.02"
0.02"
0.06"
0.08"
1972
2002
1912
2011
1971
FEBRUARY
2.16"
10.05"
8.36"
7.81"
5.96"
5.79
1993
1901
1980
1976
1905
Trace
0.02"
0.02"
0.07"
0.08"
1967
1972
1912
2002
1924
MARCH
2.12"
6.75"
6.18"
6.05"
6.00"
5.69"
1970
1973
1906
1991
1982
Trace
0.03"
0.04"
0.06"
0.08"
1972
1997
2008
1933
1959
APRIL
1.15"
5.62"
4.47"
4.21"
3.85"
3.83"
1965
1917
1900
1903
1988
Trace
Trace
0.01"
0.06"
0.07"
2008
1991
1989
1916
1996
MAY
0.63"
4.14"
2.40"
2.27"
2.16"
2.08"
1992
1915
1901
1979
2009
0.00”
0.00”
0.00”
Trace
Trace
2012
2004
2002
1996
1974
JUNE
0.36"
2.92"
2.79"
2.19"
1.93"
1.88"
1955
1956
1949
1972
1903
0.00"
0.00"
0.00"
0.00"
0.00"
2012
2011
2002
1998
1971
*Climatological Standard Normals 1981-2010.
25
MAXIMUM AND MINIMUM PRECIPITATION BY MONTHS
WITH YEAR OF OCCURRENCE
(September 1898 - August 2013)
Maximum Monthly
Precipitation
Minimum Monthly
Precipitation
Normal*
Amount
Year
Amount
Year
JULY
2.61"
7.58"
7.57"
6.62"
6.06"
5.94"
1919
2013
1986
1930
2010
Trace
0.21"
0.23"
0.29"
0.32"
1993
1997
1900
2000
1963
AUGUST
3.11"
8.77"
8.06"
6.73"
6.10"
5.80"
1904
1986
1909
1902
1992
0.26"
0.37"
0.54"
0.58"
0.61"
1962
1924
1915
1976
1912
SEPTEMBER
2.38"
6.75"
6.60"
6.18"
4.85"
4.80"
1983
1958
1990
1965
1986
Trace
Trace
Trace
Trace
0.02"
1992
1973
1957
1955
1956
OCTOBER
1.66"
9.86"
4.90"
4.89"
4.64"
4.58"
1972
1941
1899
1987
1907
0.00"
0.00"
Trace
Trace
Trace
1917
1902
1999
1952
1950
NOVEMBER
1.76"
7.10"
6.75"
6.64"
6.16"
5.50"
1905
1902
1985
1978
1919
0.00"
0.00"
0.00"
0.00"
0.00”
1999
1932
1916
1904
1903
DECEMBER
1.87"
7.30"
6.78"
6.63"
6.17"
5.74"
1967
1992
1965
1966
1908
0.00"
Trace
Trace
0.01"
0.01"
1917
1999
1958
2005
1929
*Climatological Standard Normals 1981-2010.
26
GREATEST DAILY 24-HOUR PRECIPITATION (INCHES)
(Midnight - Midnight)
September 1898 - December 2013
JANUARY
FEBRUARY
MARCH
APRIL
Date
24 Hr
Pcpn
Year
24 Hr
Pcpn
Year
24 Hr
Pcpn
Year
24 Hr
Pcpn
Year
1
2
3
4
5
6
7
8
9
10
2.08
1.45
1.23
1.57
1.15
1.23
1.42
1.65
1.13
1.61
1910
1922
2005
2005
1974
1965
1993
1993
1905
1911
1.01
2.30
1.35
1.44
2.29
1.59
1.24
2.05
2.07
1.63
1919
1901
1901
1958
1976
1965
1901
1993
1976
1978
2.81
0.95
2.11
1.14
0.77
0.85
0.53
1.27
0.70
1.85
1970
1978
1938
1908
1907
2000
2010
1918
1926
1912
2.95
0.91
1.02
1.19
0.80
0.41
0.62
1.04
0.73
0.71
1903
1977
1965
1929
2001
2002
1946
1935
2011
1965
11
12
13
14
15
16
17
18
19
20
0.97
1.00
1.12
0.42
0.92
0.84
1.83
1.73
0.74
0.90
2005
2001
1997
1969
1978
1917
1979
1952
1937
1917
1.36
0.70
1.84
2.37
1.07
1.40
0.49
0.65
3.93
1.18
2005
1931
1992
1980
1927
1927
1971
1980
1993
1993
1.91
1.43
1.27
1.31
0.77
1.27
0.73
1.39
1.58
0.69
1982
1906
1905
1944
1945
1930
1922
2012
1994
1981
1.09
1.67
0.65
0.71
0.48
1.80
1.67
0.72
0.44
0.56
1905
1941
1976
1976
1976
1934
1917
1968
1951
1995
21
22
23
24
25
26
27
28
29
30
31
3.39
1.53
1.73
1.11
1.70
1.55
1.81
0.85
2.05
1.21
0.87
2010
1909
1943
1944
1901
2013
1916
1916
1915
1922
1919
1.03
0.68
0.62
1.19
0.84
1.17
0.80
1.80
0.73
1944
1907
1957
1987
1958
1902
1905
1991
1960
1.02
1.28
1.09
1.14
1.83
1.10
0.59
1.13
0.83
0.84
1.24
1991
1954
1954
1902
1910
1989
1938
1998
1967
1970
1903
1.70
1.08
0.45
1.01
0.36
1.22
0.69
1.01
0.74
0.78
1985
1925
1999
1990
1994
1963
1994
1900
1951
1954
Month
3.39
2010
3.93
1993
2.81
1970
2.95
1903
27
GREATEST DAILY 24-HOUR PRECIPITATION (INCHES)
(Midnight - Midnight)
September 1898 - December 2013
MAY
JUNE
JULY
AUGUST
Date
24 Hr
Pcpn
Year
24 Hr
Pcpn
Year
24 Hr
Pcpn
Year
24 Hr
Pcpn
Year
1
2
3
4
5
6
7
8
9
10
0.77
0.75
0.97
0.67
0.55
0.93
0.33
0.77
0.85
0.63
1915
1901
1908
1960
1992
1921
1927
1976
1922
1944
0.31
0.91
0.31
0.52
0.40
0.55
0.28
0.34
0.26
1.47
1991
1999
1915
1986
1903
1993
1912
1907
1983
1957
0.51
1.76
0.92
1.85
1.06
0.55
0.77
1.33
0.88
0.96
1911
2013
1944
1986
1967
1990
1974
1981
1988
2013
1.38
1.71
1.64
1.11
0.76
2.16
1.14
1.38
1.40
1.30
1906
1963
1907
1993
2000
1986
1937
1959
1977
1953
11
12
13
14
15
16
17
18
19
20
0.81
0.45
0.53
0.72
0.52
0.30
0.96
0.65
0.50
0.95
1980
1965
1994
1901
1951
1951
1903
2011
1957
1900
0.39
1.32
1.58
0.88
0.09
0.17
0.70
0.89
0.45
0.32
1927
1955
1955
1921
1965
1933
1933
1949
1967
1925
1.03
0.69
1.55
0.84
2.55
1.05
1.08
1.27
2.14
1.59
1918
1918
1976
2012
1964
1908
1911
2010
1986
1986
1.10
1.99
3.04
1.10
1.10
0.85
1.28
1.07
0.90
1.84
1979
1987
1986
1909
1921
1958
1920
1989
1984
2004
21
22
23
24
25
26
27
28
29
30
31
0.52
0.78
0.97
1.11
0.23
0.75
0.68
0.61
0.92
0.46
0.39
1975
2009
1919
1965
1994
1992
1901
1990
1992
1986
2003
0.68
1.27
0.17
0.29
0.78
0.32
0.75
0.66
2.40
0.39
1958
1922
2000
1922
1954
1954
1940
1938
1956
1956
1.20
1.51
1.35
1.37
1.35
1.61
1.13
2.19
1.37
1.33
1.14
1918
1962
1983
1984
2003
1969
1905
1929
1977
2010
2005
1.88
2.75
1.62
1.13
1.10
0.98
0.90
2.28
1.62
1.23
1.79
1932
1992
1988
2005
1931
1984
2007
1951
1951
1946
1963
Month
1.11
1965
2.40
1956
2.55
1964
3.04
1986
28
GREATEST DAILY 24-HOUR PRECIPITATION (INCHES)
(Midnight - Midnight)
September 1898 - July 2002
SEPTEMBER
OCTOBER
NOVEMBER
DECEMBER
Date
24 Hr
Pcpn
Year
24 Hr
Pcpn
Year
24 Hr
Pcpn
Year
24 Hr
Pcpn
Year
1
2
3
4
5
6
7
8
9
10
1.32
0.86
0.59
0.65
2.84
0.82
1.08
1.07
1.61
1.40
1998
1990
1907
1970
1970
2002
2002
2011
2003
1924
1.85
1.03
1.34
1.60
1.80
2.34
1.55
1.36
1.13
0.58
1959
1981
1968
1972
1940
1993
1924
1961
1960
1985
1.53
1.30
1.46
0.65
0.71
0.95
0.76
1.80
0.87
1.90
1987
1957
1957
2011
1987
1915
1969
1966
1915
1923
1.38
0.94
1.33
1.55
0.98
2.87
1.75
0.83
1.10
0.97
2007
1906
1908
1992
1966
1966
2009
1972
1965
1961
11
12
13
14
15
16
17
18
19
20
1.97
1.80
2.75
1.50
0.46
1.29
1.71
2.11
1.03
1.52
1985
1927
1941
1999
1906
2007
1925
1965
2004
1952
1.52
1.10
1.31
0.76
0.82
1.77
0.97
1.75
1.52
1.18
1899
1899
1941
2006
1994
1971
1907
1949
1972
1979
3.21
2.00
0.75
1.96
1.25
0.71
1.30
0.66
0.49
1.85
1978
2003
1910
1991
1991
1969
1953
1973
1940
1902
0.98
0.88
1.52
1.41
2.08
1.74
1.20
2.65
2.32
1.16
1927
1937
1967
1967
1908
1908
1978
1978
1967
1968
21
22
23
24
25
26
27
28
29
30
31
0.81
1.03
2.71
1.65
1.00
1.35
1.56
1.79
1.70
1.75
1990
1958
1983
1900
1986
1997
1903
1958
1971
1983
0.94
0.60
0.57
2.42
1.48
0.67
0.82
1.61
1.24
1.54
1.79
2004
2000
1921
1992
1998
1982
1991
2004
1987
1920
1987
1.50
0.68
1.64
0.55
2.00
1.85
2.96
1.86
1.42
2.13
2004
1965
1906
1918
1985
1919
1919
1975
1985
1982
1.03
1.50
1.38
0.44
1.31
1.83
1.22
2.50
3.33
2.95
1.22
1909
1965
1945
1959
1940
1971
1984
1992
2004
1951
1915
Month
2.84
1970
2.42
1992
3.21
1978
3.33
2004
29
GREATEST NUMBER OF DAYS WITH 0.01 INCH OR MORE AND 0.10 INCH
OR MORE BY MONTH AND YEAR OF OCCURRENCE
(1899-2013)
0.01 Inch or more
Average
Greatest
# of Days
# of Days
Month
Year
0.10 Inch or more
Average
Greatest
# of Days
# of Days
Year
January
February
March
April
May
June
July
August
September
October
November
December
7.3
7.4
7.8
5.8
3.9
2.9
11.9
12.4
7.0
5.2
4.8
6.7
18
16
21
20
15
10
21
23
16
15
15
18
1993
2005
1973
1926
1992
1988
1959
1904
1997
1972
1931
1984
4.4
4.7
4.9
3.2
1.8
1.3
6.6
6.9
4.0
3.1
3.0
4.1
17
14
15
11
11
8
16
18
13
13
11
12
1993
1905
1973
1926
1992
1972
1919
1904
1996
1972
1905
1984
Annual
83.0!
121
1941
48.0!
73
1905
GREATEST NUMBER OF DAYS WITH 0.25 INCH OR MORE AND 0.50 INCH
OR MORE BY MONTH AND YEAR OF OCCURRENCE
(1899-2013)
Month
January
February
March
April
May
June
July
August
September
October
November
December
Annual
0.25 Inch or more
Average
Greatest
# of Days
# of Days
Year
0.50 Inch or more
Average
Greatest
# of Days
# of Days
Year
2.5
2.7
2.8
1.8
0.9
0.5
3.7
3.7
2.3
1.9
1.8
2.5
11
10
9
8
6
4
14
10
9
9
9
9
1993
1905
1992*
1965
1992
1903
1919
1934*
1939
1972*
1905
1965
1.3
1.1
1.1
0.7
0.3
0.2
1.6
1.7
1.1
1.1
0.9
1.0
7
6
5
6
3
2
6
6
5
6
5
5
1993*
1980*
1978*
1965
1992*
1988*
1917
1909*
1958
1972
1905
1966*
27.0!
47
1905
12.1!
24*
1965
* Also recorded in earlier years.
! May be different than sum of average number of days due to rounding.
30
GREATEST NUMBER OF CONSECUTIVE DAYS WITH 0.01 INCH OR MORE
(Periods with 10 or more days tabulated)
(September 1898 – December 2013)
Total
Days
Period
Rainfall
17
13
13
11
11
11
11
10
10
10
10
10
10
10
10
July 20 - August 5, 1968
July 18 - July 30, 1959
August 23 - September 4, 1925
February 7 - February 17, 1992
January 19 - January 29, 1969
January 9 - January 19, 1949
July 10 - July 20, 1919
August 5 – August 14, 2005
August 31 – September 9, 2003
February 13 - February 22, 1980
August 8 - August 17, 1947
December 24, 1941 - January 2, 1942
April 26 - May 5, 1926
July 17 - July 26, 1909
July 26 - August 4, 1908
3.29"
1.85"
1.96"
3.69"
4.05"
4.52"
4.32"
1.84”
2.71”
7.81"
3.21"
1.56"
1.36"
1.61"
3.30"
GREATEST NUMBER OF CONSECUTIVE DAYS WITH 0.25 INCH OR MORE
(Periods with 5 days or more tabulated)
(September 1898 - December 2013)
Total
Days
Period
Rainfall
7
7
6
5
5
5
5
December 13 - December 19, 1967
July 10 - July 16, 1919
July 20 - July 25, 1915
September 7 – September 11, 2013
February 17 - February 21, 1980
October 31 - November 4, 1957
February 13 - February 17, 1927
7.06"
3.50"
4.38"
2.93”
4.36"
4.57"
3.92"
GREATEST NUMBER OF CONSECUTIVE DAYS WITH 0.50 INCH OR MORE
(Periods with 4 or more days tabulated)
(September 1898 - December 2013)
Total
Days
Period
Rainfall
4
4
4
4
February 18 - February 21, 1980
January 25 - January 28, 1916
July 22 - July 25, 1915
October 11 - October 14, 1899
31
4.06"
3.92"
3.65"
4.61"
GREATEST NUMBER OF CONSECUTIVE DAYS WITH 0.75 INCH OR MORE
(Periods with 3 or more days tabulated)
(September 1898 - July 2013)
Total
Days
Period
Rainfall
3
3
3
3
3
3
December 5 - December 7, 1966
January 6 - January 8, 1993
February 28 - March 2, 1978
July 23 - July 25, 1915
March 24 - March 26, 1906
October 11 - October 13, 1899
4.79"
3.89"
3.47"
3.03"
2.62"
3.87"
GREATEST NUMBER OF CONSECUTIVE DAYS WITHOUT MEASURABLE
PRECIPITATION (Less than 0.01 inch) DURING AN ENTIRE YEAR
(September 1898 – December 2013)
Days
99
93
77
77
75
69
Period
Days
September 24 - December 31, 1999
April 3 - July 4, 1974
October 3 - December 18, 1903
September 10 - November 25, 1898
April 19 - July 2, 1996
April 21 - June 28, 1966
67
66
64
63
63
62
32
Period
April 27 - July 2, 2002
April 27 - July 1, 2012
February 7 - April 10, 1972
March 29 - May 30, 1991
October 26 - December 27, 1989
May 1 - July 1, 1942
EXCESSIVE STORMS*
1898-2013
(tabulated only for storms* with 3.50" or greater)
Days
Period
Total Precip
10
8
8
5
9
6
8
7
5
11
7
6
9
11
7
11
6
2
6
11
17
6
6
7
February 13 - February 22, 1980
December 13 - December 20, 1967
February 14 - February 21, 1993
December 3 - December 7, 1966
January 6 - January 14, 1993
January 18 – January 23, 2010
February 27 - March 6, 1978
October 31 - November 6, 1957
October 3 - October 7, 1972
January 9 - January 19, 1949
July 20 - July 26, 1915
January 25 - January 30, 1916
August 21 - August 29, 1904
July 10 - July 20, 1919
February 11 - February 17, 1927
January 19 - January 29, 1969
September 5 - September 11, 2002
December 28 - December 29, 2004
October 15 - October 20, 1972
February 7 - February 17, 1992
July 20 - August 5, 1968
March 11 - March 16, 1982
February 27 - March 4, 1938
January 14 - January 20, 1916
7.80"
7.20"
6.48"
5.50"
5.40"
5.31”
5.12"
4.76"
4.70"
4.51"
4.48"
4.32"
4.32"
4.29"
4.20"
4.07"
3.89”
3.88”
3.78"
3.74"
3.74"
3.66"
3.60"
3.50"
Highest daily total
2.37"
2.32"
3.93"
2.87"
1.65"
3.39”
1.41"
1.46"
1.70"
1.09"
1.19"
1.81"
1.44"
0.76"
1.40"
1.30"
1.12”
3.33”
1.52"
1.84"
0.50"
1.91"
2.11"
1.32"
* An excessive storm has been defined as a period of time where measurable precipitation falls
on consecutive days, leading to 3.50 inches or greater accumulation by the time the precipitation
ends.
33
FLAGSTAFF ARIZONA YEARLY PRECIPITATION RECORD
(1899-2013)
1899 19.32"
1900
1901
1902
1903
1904
16.57"
21.48"
25.86"
25.05"
20.07"
1935
1936
1937
1938
1939
16.42"
19.30"
19.41"
20.48"
12.91"
1970
1971
1972
1973
1974
24.02"
21.01"
24.67"
19.71
17.41"
2005
2006
2007
2008
2009
24.01”
15.56”
17.46”
18.85”
11.65”
1905
1906
1907
1908
1909
34.53"
22.70"
25.02"
25.91"
22.75"
1940
1941
1942
1943
1944
21.22"
25.02"
9.90"
17.34"
17.50"
1975
1976
1977
1978
1979
20.10"
20.12"
18.77"
30.72"
19.68"
2010
2011
2012
2013
27.89”
20.67”
14.89”
24.77”
1910
1911
1912
1913
1914
18.25"
26.00"
17.69"
15.27"
17.40"
1945
1946
1947
1948
1949
17.62"
21.74"
13.14"
15.39"
26.79"
1980
1981
1982
1983
1984
29.30"
23.37"
31.09"
29.47"
20.09"
1915
1916
1917
1918
1919
25.54"
23.38"
18.82"
21.29"
28.28"
1950
1951
1952
1953
1954
10.76"
25.79"
20.06"
12.81"
19.55"
1985
1986
1987
1988
1989
26.67"
32.39"
23.98"
21.68"
14.44"
1920
1921
1922
1923
1924
19.33"
22.93"
25.07"
21.07"
16.74"
1955
1956
1957
1958
1959
17.97"
10.37"
24.26"
21.22"
20.42"
1990
1991
1992
1993
1994
25.67"
21.83"
34.71"
35.60"
21.95"
1925
1926
1927
1928
1929
19.08"
16.58"
24.03"
14.88"
15.52"
1960
1961
1962
1963
1964
16.66"
18.95"
18.11"
14.53"
19.04"
1995
1996
1997
1998
1999
19.09"
11.81"
17.84"
27.37"
15.79"
1930
1931
1932
1933
1934
21.24"
20.34"
21.94"
15.60"
14.80"
1965
1966
1967
1968
1969
36.59"
20.28"
22.27"
16.53"
23.31"
2000
2001
2002
2003
2004
15.40"
17.55”
12.88”
17.85”
23.61”
34
15 WETTEST YEARS
(1899 - 2013)
Rank
Amount
Year
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
36.59"
35.60"
34.71"
34.53"
32.39"
31.09"
30.72"
29.47"
29.30"
28.28"
27.89”
27.37"
26.79"
26.67"
26.00"
1965
1993
1992
1905
1986
1982
1978
1983
1980
1919
2010
1998
1949
1985
1911
15 DRIEST YEARS
(1899 - 2013)
Rank
Amount
Year
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
9.90"
10.37"
10.76"
11.65"
11.81”
12.81"
12.88”
12.91"
13.14"
14.44"
14.52"
14.80"
14.88"
14.89"
15.27"
1942
1956
1950
2009
1996
1953
2002
1939
1947
1989
1963
1934
1928
2012
1913
*AVERAGE YEARLY PRECIPITATION: 21.86"
* Based on the 30 year average yearly precipitation from 1981-2010.
35
FLAGSTAFF SEASONAL SNOWFALL*
(1899-2013)
1900 70.0"!
1901 124.5"
1902 76.8"
1903 128.3"
1904 41.4"
1935
1936
1937
1938
1939
44.1"
16.0"
97.6"
42.0"
70.2"
1970
1971
1972
1973
1974
95.7"
56.6"
50.3"
210.0"
70.0"
2005
2006
2007
2008
2009
131.7”
44.6”
50.4”
99.5”
86.0”
1905
1906
1907
1908
1909
92.2"
63.8"
86.4"
69.2"
73.4"
1940
1941
1942
1943
1944
48.4"
61.5"
65.0"
64.4"
99.5"
1975
1976
1977
1978
1979
141.1"
131.6"
70.2"
116.3"
145.5"
2010
2011
2012
2013
140.5”
88.4”
102.9”
69.7”
1910
1911
1912
1913
1914
82.9"
34.3"
70.6"
65.4"
39.6"
1945
1946
1947
1948
1949
84.0"
51.5"
32.4"
107.0"
167.0"
1980
1981
1982
1983
1984
177.1"
92.4"
121.6"
142.6"
32.0"
1915 117.0"
1916 129.5"
1917 111.1"
1918 28.7"
1919 69.8"
1950
1951
1952
1953
1954
63.3"
73.8"
105.9"
60.0"
89.0"
1985
1986
1987
1988
1989
136.0"
105.4"
121.6"
104.5"
77.7"
1920
1921
1922
1923
1924
74.7"
53.3"
96.6"
96.7"
54.5"
1955
1956
1957
1958
1959
67.6"
42.7"
50.1"
70.8"
53.8"
1990
1991
1992
1993
1994
113.4"
127.9"
158.9"
150.0"
109.5"
1925
1926
1927
1928
1929
49.5"
29.3"
48.7"
39.0"
50.0"
1960
1961
1962
1963
1964
77.6"
53.9"
128.5"
47.3"
89.4"
1995
1996
1997
1998
1999
99.1"!
28.5"!
107.5"!
136.7"
72.0"
1930
1931
1932
1933
1934
57.3"
18.0"
92.9"
66.0"
11.2"
1965
1966
1967
1968
1969
166.7"
83.4"
63.1"
150.4"
134.7"
2000
2001
2002
2003
2004
74.4"
125.1"
38.9”
54.9”
48.1”
* Snowfall is for the period of July through June ending in the year indicated.
! Estimated
36
15 SNOWIEST SEASONS
(July 1899 - June 2013)
Rank
Amount
Year
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
210.0"
177.1"
167.0"
166.7"
158.9"
150.4"
150.0"
145.5"
142.6"
141.1"
140.5”
136.7"
136.0"
134.7"
131.7"
1972-1973
1979-1980
1948-1949
1964-1965
1991-1992
1967-1968
1992-1993
1978-1979
1982-1983
1974-1975
2009-2010
1997-1998
1984-1985
1968-1969
2004-2005
15 LEAST SNOWIEST SEASONS
(July 1899 - June 2013)
Rank
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Amount
Year
11.2"
16.0"
18.0"
28.5"
28.7"
29.3"
32.0"
32.4"
34.3"
38.9”
39.0"
39.6"
41.4"
42.0"
42.7"
1933-1934
1935-1936
1930-1931
1995-1996
1917-1918
1925-1926
1983-1984
1946-1947
1910-1911
2001-2002
1927-1928
1913-1914
1903-1904
1937-1938
1955-1956
AVERAGE* YEARLY SNOWFALL: 101.7"
* Based on the 30 year average yearly snowfall from 1981-2010.
37
GREATEST DAILY 24-HOUR SNOWFALL (INCHES)
(Midnight - Midnight)
September 1898 - December 2013
JANUARY
FEBRUARY
MARCH
APRIL
Date
24 Hr
Snow
Year
24 Hr
Snow
Year
24 Hr
Snow
Year
24 Hr
Snow
Year
1
2
3
4
5
6
7
8
9
10
9.8
6.2
13.6
18.8
12.1
13.0
16.5
9.1
8.8
15.1
1907
1990
2005
2005
1974
1992
1937
1985
1980
1949
13.6
24.0
13.5
10.5
19.9
15.2
12.4
12.9
14.6
15.0
1990
1901
1901
1939
1976
1965
1901
2009
2009
1978
26.0
9.5
11.9
11.0
7.0
14.3
7.6
13.8
8.9
17.5
1970
1964
1976
1923
2004
2000
2000
1992
1948
1969
9.0
17.8
10.2
9.8
4.0
7.2
6.0
7.4
13.2
7.8
1999
1997
1965
1999
1999
2001
1998
1975
2011
1965
11
12
13
14
15
16
17
18
19
20
10.0
8.2
16.4
3.7
8.9
13.0
14.7
13.2
11.0
7.1
1930
1960
1997
1993
1978
1928
1988
1980
1935
1954
8.7
6.1
9.5
16.0
10.0
5.2
4.8
16.0
12.1
8.7
1973
1959
1992
2001
1932
1975
1971
1917
2011
1987
19.3
10.2
7.1
13.0
10.6
17.6
5.8
19.5
9.0
7.8
1952
2006
1990
1944
1987
1986
1963
2012
1980
1981
6.0
12.0
5.4
9.7
5.0
15.0
10.0
9.3
5.0
8.9
1967
1941
1976
2012
1976
1917
1988
1968
1966
1995
21
22
23
24
25
26
27
28
29
30
31
19.6
14.9
17.3
19.9
16.0
13.1
16.0
7.2
18.0
9.6
12.0
2010
2010
1943
1949
1923
1948
1916
1979
1915
1980
1922
10.0
9.7
6.0
21.1
12.4
6.1
11.9
11.0
6.4
1944
2008
1948
1987
1998
1962
1997
1991
1960
15.4
12.2
11.4
11.2
12.0
14.9
6.6
11.6
12.8
8.9
6.9
1991
1973
1964
1902
1903
1991
1998
1973
1998
1970
1970
11.1
7.5
3.2
4.9
4.1
8.5
8.7
10.1
9.5
10.0
1988
1988
1900
1994
1994
1985
1994
1900
1951
1915
Month
19.9
1949
24.0
1901
26.0
1970
17.8
1997
38
GREATEST DAILY 24-HOUR SNOWFALL (INCHES)
(Midnight - Midnight)
September 1898 - December 2013
MAY
Date
24 Hr
Snow
Year
1
2
3
4
5
6
7
8
9
10
5.0
7.5
9.0
3.9
4.6
4.5
2.1
4.7
0.5
TR
1915
1901
1904
1905
1969
1949
1964
1979
1922
2011
11
12
13
14
15
16
17
18
19
20
0.3
2.0
3.7
0.3
6.0
1.9
9.0
1.6
0.9
0.4
1957
1968
2008
1998
1951
1944
1903
2011
1917
1975
21
22
23
24
25
26
27
28
29
30
31
4.7
0.6
4.4
6.6
TR
TR
0.8
2.0
2.5
TR
TR
Month
9.0
JUNE
JULY
24 Hr
Snow
Year
TR
TR
TR
TR
TR
TR
0.5
1992
1949
1999
1999
1993
1992
1907
TR
1949
1975
2008
2008
1965
1996
1993
1962
1962
1971
1988
1991
TR
1947
1903
0.5
1907
39
AUGUST
24 Hr
Snow
Year
24 Hr
Snow
Year
0.0
ALL
0.0
ALL
GREATEST DAILY 24-HOUR SNOWFALL (INCHES)
(Midnight - Midnight)
September 1898 – December 2013
SEPTEMBER
NOVEMBER
DECEMBER
24 Hr
Snow
Year
24 Hr
Snow
Year
24 Hr
Snow
Year
1
2
3
4
5
6
7
8
9
10
0.3
0.2
0.2
TR
3.6
0.7
TR
5.0
2.0
0.6
1959
1907
1986
1946
1912
1912
2011
1961
1961
2013
1.0
8.0
6.0
5.0
5.7
6.3
6.8
11.2
2.5
6.2
2000
1974
1922
1925
2011
1977
2011
1966
2008
1982
6.0
4.5
6.1
14.6
8.5
11.5
20.1
8.3
14.0
12.9
2011
1947
1961
1992
1992
1943
2009
1972
1931
2007
11
12
13
14
15
16
17
18
19
20
0.6
0.2
TR
8.2
4.5
5.9
6.7
5.5
4.7
7.0
1997
1947
1947
1994
1980
1971
1971
1908
1949
1920
11.2
18.4
5.0
12.8
11.8
11.5
4.7
6.5
5.5
20.0
1972
1985
1961
1993
1991
1958
1972
1994
1979
1902
9.6
14.0
26.8
15.5
11.7
8.0
10.0
7.2
22.7
11.2
2001
1932
1967
1967
2012
2008
1924
2002
1967
1968
5.5
1.1
TR
1.0
9.1
4.2
1.5
9.8
6.0
9.5
9.0
2004
2004
1953
1920
1972
1996
1996
2004
1922
1974
1920
15.4
5.6
11.5
15.5
8.0
6.4
23.0
14.2
12.1
13.4
1905
2013
1906
1906
1983
1990
1919
1975
1985
1982
19.6
12.7
11.0
4.0
12.0
14.1
4.7
9.2
12.5
31.0
20.0
1909
1965
1997
1914
1916
1979
1946
1936
1989
1915
1915
9.8
2004
23.0
1919
31.0
1915
Date
21
22
23
24
25
26
27
28
29
30
31
24 Hr
Snow
OCTOBER
Year
TR
1909
TR
2.0
1950
1965
TR
0.9
1989
1986
TR
2013
0.3
1905
Month
2.0
TR = TRACE
1965
40
SNOWIEST CALENDAR DAYS IN FLAGSTAFF
(1899 - 2013)
(Midnight to Midnight)
Rank
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Amount
Date
31.0"
26.8"
26.0"
24.0"
23.0"
22.7"
21.1"
20.1"
20.0"
20.0"
19.9”
19.9"
19.6"
19.6"
19.5"
Dec 30, 1915
Dec 13, 1967
Mar 1, 1970
Feb 2, 1901
Nov 27, 1919
Dec 19, 1967
Feb 24, 1987
Dec 7, 2009
Dec 31, 1915
Nov 20, 1902
Feb 5, 1976
Jan 24, 1949
Jan 21, 2010
Dec 21, 1909
Mar 18, 2012
GREATEST CONSECUTIVE DAYS WITH
MEASURABLE SNOW ON THE GROUND IN FLAGSTAFF
(1950 - 2013)
(Based on the 5 a.m. measurement)
Rank
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Days
Dates
140
93
82
80
76
70
64
57
54
53
53
50
46
44
44
Dec 5, 1972 - Apr 23, 1973
Dec 9, 2007 - Mar 10, 2008
Dec 8, 2009 - Feb 27, 2010
Dec 22, 1959 - Mar 10, 1960
Dec 10, 1965 - Feb 23, 1966
Dec 13, 1967 - Feb 20, 1968
Jan 3 - Mar 7, 1955
Jan 9 - Mar 6, 2001
Jan 3 - Feb 25, 2005
Dec 14, 2008 - Feb 4, 2009
Jan 15 - Mar 8, 1979
Nov 28, 1975 - Jan 16, 1976
Feb 7 - Mar 24, 1969
Dec 14, 2012 - Jan 26, 2013
Dec 20, 1991 - Feb 1, 1992
41
MAXIMUM MONTHLY SNOWFALL
WITH YEAR OF OCCURRENCE
(September 1898 - December 2013)
Normal*
Amount
Year
JANUARY
23.2"
104.8"
63.4"
59.4"
56.4"
56.3"
1949
1980
1979
2010
2005
FEBRUARY
20.9"
84.3"
45.5"
42.1"
41.0"
40.7"
1901
1990
1969
1998
1987
MARCH
20.7"
79.4"
77.4"
67.3"
48.4"
45.6"
1991
1973
1970
2000
1981
APRIL
7.1"
58.3"
41.8"
40.3"
34.5"
33.1"
1965
1999
1900
1917
1988
MAY
0.7"
15.0"
10.2"
10.0"
9.0"
8.7 "
1904
1903
1908
1905
2008
0.5"
TR
TR
TR
TR
1907
1999
1993
1992
1949!
JUNE
0.0"
* Climatological Standard Normals 1981-2010.
! Also occurred in earlier years.
42
MAXIMUM MONTHLY SNOWFALL
WITH YEAR OF OCCURRENCE
(September 1898 - December 2013)
Normal*
Amount
Year
JULY
0.0"
0.0"
ALL
AUGUST
0.0"
0.0"
ALL
SEPTEMBER
0.0”
2.0"
0.9"
0.3"
TR
TR
1965
1986
1905
2013
1993!
OCTOBER
1.5"
24.7"
19.0"
16.6"
16.4"
11.8"
1971
1920
1974
2004
1972
NOVEMBER
10.7"
42.6"
40.7"
39.5"
30.3"
27.9"
1902
1985
1991
1919
1906
DECEMBER
16.9"
86.0"
66.3"
41.7"
39.1"
38.5"
1967
1915
1992
2008
1965
* Climatological Standard Normals 1981-2010.
! Also occurred in earlier years.
43
EXCESSIVE SNOWSTORMS* AT FLAGSTAFF
(January 1899- December 2013)
(tabulated only for storms* with 25" or greater)
Days
Period
Total Snow
8
6
3
9
4
4
5
6
4
2
6
4
6
8
7
4
5
5
8
3
4
6
3
3
3
3
6
9
2
5
5
2
3
5
5
3
December 13 - December 20, 1967
January 18 - January 23, 2010
December 29 - December 31, 1915
January 9 - January 17, 1949
February 1 - February 4, 1901
January 22 - January 25, 1949
April 1 -April 5, 1999
January 25 - January 30, 1916
November 20 - November 23, 1902
January 3 - January 5, 2005
February 6 - February 11, 1901
February 28 - March 3, 1970
April 7 - April 12, 1965
December 25 - January 1, 1937
March 7 - March 13, 2006
February 23 - February 26, 1987
January 14 - January 18, 1979
April 1 - April 5, 1997
January 15 - January 22, 1917
February 8 - February 10, 2009
April 13 - April 16, 1976
March 5 - March 10, 2000
April 15 - April 17, 1917
November 23 - November 25, 1906
January 28 - January 30, 1980
February 4 - February 6, 1976
January 20 - January 25, 1962
December 30 - January 7, 1982
March 18 - March 19, 2012
January 10 - January 14, 1930
March 26 - March 30, 1998
November 27 - November 28, 1919
January 22 - January 24, 1943
April 1 - April 5, 1965
December 7 - December 11, 2007
November 27 - November 29, 1975
84.6"
54.2”
54.0"
48.4"
47.4"
43.5"
41.3"
39.0"
38.6"
35.0”
33.6"
33.3"
32.6"
32.2"
31.2”
31.2"
30.7"
29.7"
29.7"
29.3”
28.7"
28.3"
27.5"
27.2"
27.1"
26.9"
26.7"
26.6"
26.4”
26.5"
26.4"
26.0"
25.9"
25.7"
25.4”
25.2"
Highest daily total
26.8"
19.6”
31.0"
15.1"
24.0"
19.9"
11.0"
16.0"
20.0"
18.8”
12.4"
26.0"
9.9"
10.8"
14.8”
21.1"
14.3"
17.8"
12.0"
14.6”
10.5"
14.3"
15.0"
15.5"
15.3"
19.9"
13.7"
9.4"
19.5”
10.0"
12.8"
23.0"
17.3"
10.2"
12.9”
14.2"
* An excessive snowstorm has been defined as a period of time where measurable snowfall
occurs on consecutive days, leading to 25 inches or greater accumulation by the time the
snowfall ends.
44
AVERAGE NUMBER OF DAYS WITH SNOWFALL OF 1 INCH OR MORE
(1951-2013)
JANUARY
FEBRUARY
MARCH
APRIL
MAY
JUNE
JULY
AUGUST
SEPTEMBER
OCTOBER
NOVEMBER
DECEMBER
4.1
4.0
4.4
2.2
0.4
0
0
0
*
0.5
2.0
3.6
ANNUAL
21.1
AVERAGE NUMBER OF DAYS WITH THUNDERSTORMS
(1965-1994)
JANUARY
FEBRUARY
MARCH
APRIL
MAY
JUNE
JULY
AUGUST
SEPTEMBER
OCTOBER
NOVEMBER
DECEMBER
*
0.3
0.6
1.3
2.6
3.7
16.4
15.6
6.7
2.2
0.6
0.2
ANNUAL
50.1
* Less than 0.1 occurrences.
45
MONSOON SEASON STATISTICS
(1899 - 2013)
Monsoon Season is defined as June 15 – September 30
Normal*
8.31"
Wettest
Amount
Year
Driest
Amount
Year
20.00"
15.70"
13.95"
13.16"
12.65"
12.21"
11.99"
11.99"
11.61"
11.56"
2.31"
2.87"
2.94"
3.12"
3.22"
3.33"
3.80"
3.84"
3.98"
4.29"
1986
2013
1904
1983
1911
1990
1998
1919
1927
1970
*based on 1981-2010 climatological normals
46
1978
2009
1991
1973
1957
1979
1942
1944
1948
1928
IV. MISCELLANEOUS INFORMATION
47
SUNSHINE, CLOUDINESS, AND FOG AT FLAGSTAFF
(1965-1994)
Sunshine
Month
Percent
Possible
Sunshine
Sky Cover (Sunrise - Sunset)
Avg Amt
of Sky
Cover Clear
Partly
Cloudy
Cloudy
Dense Fog
Number
of
Days
January
February
March
April
May
June
July
August
September
October
November
December
77%
73%
76%
82%
88%
86%
75%
76%
81%
79%
75%
73%
5.2
5.3
5.3
4.7
4.1
3.0
5.3
5.1
3.7
3.6
4.2
4.8
12.4
10.7
11.6
12.4
15.2
18.5
9.1
9.8
15.7
17.1
15.4
13.9
6.3
6.0
7.8
8.8
9.3
7.7
13.1
13.1
9.6
7.0
6.6
6.5
12.3
11.5
11.6
8.7
6.5
3.9
8.8
8.1
4.7
6.9
8.0
10.7
1.8
1.8
1.6
1.2
0.2
0
0.2
0.3
0.5
0.9
1.2
1.9
Annual
78%
4.5
161.8
101.7
101.6
11.5
Dense fog is when the visibility is restricted to 1/4 mile or less for at least part of the day. Sky
cover is expressed in a range from 0 to 10, with 0 representing no clouds or obscuring
phenomena, and 10 representing a complete sky cover. A further break-down is as follows:
Clear
Partly Cloudy
Cloudy
0/10 to 3/10 sky cover
4/10 to 7/10 sky cover
8/10 to 10/10 sky cover
48
NORMAL HEATING DEGREE DAYS FOR FLAGSTAFF
(1981-2010)
JANUARY
FEBRUARY
MARCH
APRIL
MAY
JUNE
JULY
AUGUST
SEPTEMBER
OCTOBER
NOVEMBER
DECEMBER
1088
923
868
649
417
170
32
56
229
566
849
1096
ANNUAL
6943
NORMAL COOLING DEGREE DAYS FOR FLAGSTAFF
(1981-2010)
JANUARY
FEBRUARY
MARCH
APRIL
MAY
JUNE
JULY
AUGUST
SEPTEMBER
OCTOBER
NOVEMBER
DECEMBER
0
0
0
0
0
17
64
33
3
0
0
0
ANNUAL
117
A degree day is a measure of the departure of the average daily temperature from 65 degrees.
Each degree that the daily temperature is below 65 degrees is equal to one heating degree day.
Each degree that the daily temperature is above 65 degrees is equal to one cooling degree day.
For example, if the average temperature on a particular day was 55 degrees, the heating degree
days would then be 65-55=10 heating degree days. If the average daily temperature was 72
degrees, the cooling degree days would then be 72-65=7 cooling degree days. Each day of the
month would be calculated in the same fashion, with negative differences counted as zero.
Heating and cooling degree days are useful in the computation of fuel and power consumption
and are used by utility companies to determine heating and cooling requirements.
49
NORMALS
FLAGSTAFF, AZ
1981 to 2010
Latitude:
350 08' N
Longitude: 1110 40' W
Elevation: 7006 Feet
The daily values presented in these tables are not simple means of observed daily values. They
are interpolated using a much less variable set of monthly normals calculated using the natural
spline function.
In leap years, use the February 28th values for the 29th, and adjust the heating degree monthly
totals accordingly.
50
NORMALS
FLAGSTAFF, AZ
1981 to 2010
Latitude:
350 08' N
Longitude: 1110 40' W
Elevation: 7006 Feet
JANUARY
DATE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
TOTAL
AVG
TEMPERATURE
MAX
MIN AVG
42
17
29
42
17
29
42
17
29
42
17
29
42
17
29
42
17
30
42
17
30
42
17
30
42
17
30
42
17
30
42
17
30
42
17
30
42
17
30
42
17
30
43
17
30
43
17
30
43
17
30
43
17
30
43
18
30
43
18
30
43
18
30
43
18
30
43
18
30
43
18
30
43
18
30
43
18
30
43
18
30
43
18
30
43
18
30
43
18
31
43
18
31
42.5
17.3
DEGREE DAYS
HDD CDD
36
0
36
0
36
0
36
0
36
0
36
0
35
0
35
0
35
0
35
0
35
0
35
0
35
0
35
0
35
0
35
0
35
0
35
0
35
0
35
0
35
0
35
0
35
0
35
0
35
0
35
0
35
0
35
0
35
0
35
0
34
0
1088
0
29.9
51
PRECIPITATION
DAILY
.07
.07
.07
.07
.08
.07
.07
.07
.07
.08
.07
.07
.06
.07
.06
.07
.07
.06
.07
.06
.06
.05
.06
.06
.06
.06
.06
.06
.06
.07
.07
2.05
NORMALS
FLAGSTAFF, AZ
1981 to 2010
Latitude:
350 08' N
Longitude: 1110 40' W
Elevation: 7006 Feet
FEBRUARY
DATE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
TOTAL
AVG
TEMPERATURE
MAX
MIN AVG
43
18
31
43
18
31
43
18
31
43
18
31
44
18
31
44
18
31
44
18
31
44
18
31
44
19
31
44
19
31
44
19
31
44
19
32
44
19
32
45
19
32
45
19
32
45
19
32
45
20
32
45
20
32
45
20
33
46
20
33
46
20
33
46
20
33
46
20
33
46
21
33
46
21
34
47
21
34
47
21
34
47
21
34
44.8
19.3
DEGREE DAYS
HDD CDD
34
0
34
0
34
0
34
0
34
0
34
0
34
0
34
0
34
0
34
0
34
0
33
0
33
0
33
0
33
0
33
0
33
0
33
0
32
0
32
0
32
0
32
0
32
0
32
0
31
0
31
0
31
0
31
0
923
0
PRECIPITATION
DAILY
.07
.07
.07
.07
.07
.07
.08
.07
.08
.07
.08
.07
.08
.07
.08
.09
.08
.08
.08
.08
.09
.08
.08
.08
.08
.08
.08
.08
2.16
32.1
In leap years, use the February 28 values for February 29 and adjust the monthly totals.
52
NORMALS
FLAGSTAFF, AZ
1981 to 2010
Latitude:
350 08' N
Longitude: 1110 40' W
Elevation: 7006 Feet
MARCH
DATE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
TOTAL
AVG
TEMPERATURE
MAX
MIN AVG
47
21
34
47
22
35
48
22
35
48
22
35
48
22
35
48
22
35
48
22
35
49
23
36
49
23
36
49
23
36
49
23
36
50
23
36
50
23
37
50
23
37
50
24
37
50
24
37
51
24
37
51
24
37
51
24
38
51
24
38
52
24
38
52
24
38
52
25
38
52
25
38
52
25
39
53
25
39
53
25
39
53
25
39
53
25
39
54
25
40
54
26
40
50.4
23.6
DEGREE DAYS
HDD CDD
31
0
30
0
30
0
30
0
30
0
30
0
30
0
29
0
29
0
29
0
29
0
29
0
28
0
28
0
28
0
28
0
28
0
28
0
27
0
27
0
27
0
27
0
27
0
27
0
26
0
26
0
26
0
26
0
26
0
26
0
25
0
868
0
37.0
53
PRECIPITATION
DAILY
.07
.07
.08
.08
.08
.07
.08
.07
.08
.07
.07
.07
.08
.07
.08
.07
.06
.07
.07
.07
.06
.07
.06
.07
.06
.06
.06
.05
.06
.05
.05
2.12
NORMALS
FLAGSTAFF, AZ
1981 to 2010
Latitude:
350 08' N
Longitude: 1110 40' W
Elevation: 7006 Feet
APRIL
DATE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
TOTAL
AVG
TEMPERATURE
MAX
MIN AVG
54
26
40
54
26
40
55
26
40
55
26
41
55
26
41
55
26
41
56
27
41
56
27
41
56
27
42
56
27
42
57
27
42
57
28
42
57
28
43
58
28
43
58
28
43
58
28
43
59
29
44
59
29
44
59
29
44
60
29
44
60
30
45
60
30
45
61
30
45
61
30
46
61
31
46
62
31
46
62
31
47
62
31
47
63
32
47
63
32
47
58.2
28.5
DEGREE DAYS
HDD CDD
25
0
25
0
25
0
25
0
24
0
24
0
24
0
24
0
23
0
23
0
23
0
23
0
22
0
22
0
22
0
22
0
21
0
21
0
21
0
21
0
20
0
20
0
20
0
19
0
19
0
19
0
19
0
18
0
18
0
18
0
649
0
43.3
54
PRECIPITATION
DAILY
.05
.05
.05
.05
.04
.05
.04
.05
.05
.05
.04
.04
.04
.04
.04
.04
.04
.03
.04
.03
.03
.03
.03
.03
.03
.02
.03
.03
.03
.03
1.15
NORMALS
FLAGSTAFF, AZ
1981 to 2010
Latitude:
350 08' N
Longitude: 1110 40' W
Elevation: 7006 Feet
MAY
DATE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
TOTAL
AVG
TEMPERATURE
MAX
MIN AVG
63
32
48
63
32
48
64
33
48
64
33
49
64
33
49
65
33
49
65
33
49
65
34
50
66
34
50
66
34
50
66
34
50
67
34
51
67
35
51
67
35
51
68
35
51
68
35
52
68
35
52
69
35
52
69
36
52
69
36
53
70
36
53
70
36
53
70
36
53
71
36
54
71
37
54
71
37
54
72
37
54
72
37
55
72
37
55
73
37
55
73
38
55
68.1
35.0
DEGREE DAYS
HDD CDD
17
0
17
0
17
0
17
0
16
0
16
0
16
0
15
0
15
0
15
0
15
0
14
0
14
0
14
0
14
0
13
0
13
0
13
0
13
0
12
0
12
0
12
0
12
0
11
0
11
0
11
0
11
0
10
0
10
0
10
0
10
0
417
0
51.6
55
PRECIPITATION
DAILY
.03
.02
.03
.02
.02
.02
.02
.02
.02
.02
.01
.02
.02
.01
.02
.02
.02
.02
.02
.03
.02
.02
.02
.02
.02
.02
.02
.02
.02
.02
.02
0.63
NORMALS
FLAGSTAFF, AZ
1981 to 2010
Latitude:
350 08' N
Longitude: 1110 40' W
Elevation: 7006 Feet
JUNE
DATE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
TOTAL
AVG
TEMPERATURE
MAX
MIN AVG
74
38
56
74
38
56
74
38
56
75
38
56
75
39
57
75
39
57
76
39
57
76
39
58
76
40
58
77
40
58
77
40
59
77
41
59
77
41
59
78
41
59
78
41
60
78
42
60
79
42
60
79
43
61
79
43
61
79
43
61
80
44
62
80
44
62
80
44
62
80
45
63
81
45
63
81
46
63
81
46
63
81
46
64
81
47
64
81
47
64
77.9
41.9
DEGREE DAYS
HDD CDD
10
0
9
0
9
0
9
0
8
0
8
0
8
0
8
0
7
0
7
0
7
0
7
0
6
0
6
0
6
0
5
0
5
0
5
1
5
1
4
1
4
1
4
1
4
1
3
1
3
1
3
1
3
1
3
1
2
1
2
1
170
17
59.9
56
PRECIPITATION
DAILY
.01
.02
.01
.01
.01
.01
.01
.01
.01
.01
.01
.01
.01
.01
.01
.00
.01
.01
.01
.01
.01
.01
.01
.02
.01
.02
.02
.02
.02
.02
0.36
NORMALS
FLAGSTAFF, AZ
1981 to 2010
Latitude:
350 08' N
Longitude: 1110 40' W
Elevation: 7006 Feet
JULY
DATE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
TOTAL
AVG
TEMPERATURE
MAX
MIN AVG
81
47
64
82
48
65
82
48
65
82
48
65
82
49
65
82
49
65
82
49
66
82
50
66
82
50
66
82
50
66
82
51
66
82
51
66
82
51
66
82
51
66
82
51
67
82
52
67
81
52
67
81
52
67
81
52
67
81
52
67
81
52
67
81
52
67
81
52
67
81
52
67
81
52
67
81
52
66
80
52
66
80
52
66
80
52
66
80
52
66
80
52
66
81.2
50.9
DEGREE DAYS
HDD CDD
2
2
2
2
2
2
2
2
2
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
32
64
66.1
57
PRECIPITATION
DAILY
.04
.04
.04
.04
.05
.05
.06
.06
.07
.07
.07
.08
.08
.08
.09
.09
.10
.09
.10
.10
.10
.10
.11
.10
.11
.11
.11
.12
.11
.12
.12
2.61
NORMALS
FLAGSTAFF, AZ
1981 to 2010
Latitude:
350 08' N
Longitude: 1110 40' W
Elevation: 7006 Feet
AUGUST
DATE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
TOTAL
AVG
TEMPERATURE
MAX
MIN AVG
80
52
66
80
52
66
80
52
66
79
52
66
79
52
66
79
52
66
79
52
65
79
52
65
79
51
65
79
51
65
79
51
65
79
51
65
79
51
65
79
51
65
79
51
65
78
50
64
78
50
64
78
50
64
78
50
64
78
50
64
78
49
64
78
49
64
78
49
63
78
49
63
78
49
63
78
48
63
77
48
63
77
48
63
77
48
62
77
47
62
77
47
62
78.4
50.1
DEGREE DAYS
HDD CDD
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
1
1
1
1
1
1
1
1
1
1
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
3
1
3
1
3
1
3
0
3
0
3
0
3
0
56
33
64.2
58
PRECIPITATION
DAILY
.11
.11
.11
.11
.11
.11
.10
.11
.10
.11
.10
.11
.10
.10
.10
.10
.10
.10
.10
.10
.09
.10
.09
.10
.09
.09
.09
.10
.09
.09
.09
3.11
NORMALS
FLAGSTAFF, AZ
1981 to 2010
Latitude:
350 08' N
Longitude: 1110 40' W
Elevation: 7006 Feet
SEPTEMBER
DATE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
TOTAL
AVG
TEMPERATURE
MAX
MIN AVG
77
47
62
77
47
62
76
46
61
76
46
61
76
46
61
76
45
61
76
45
60
75
45
60
75
44
60
75
44
60
75
44
59
74
43
59
74
43
59
74
43
58
73
42
58
73
42
58
73
42
57
72
41
57
72
41
57
72
41
56
71
40
56
71
40
55
71
39
55
70
39
55
70
39
54
70
38
54
69
38
54
69
37
53
68
37
53
68
37
52
72.9
42.0
DEGREE DAYS
HDD CDD
3
1
4
1
4
1
4
0
4
0
5
0
5
0
5
0
5
0
6
0
6
0
6
0
7
0
7
0
7
0
8
0
8
0
8
0
9
0
9
0
9
0
10
0
10
0
10
0
11
0
11
0
12
0
12
0
12
0
13
0
229
3
57.4
59
PRECIPITATION
DAILY
.09
.09
.09
.09
.10
.08
.09
.08
.08
.09
.08
.09
.08
.08
.09
.07
.08
.08
.07
.08
.07
.08
.08
.07
.08
.06
.07
.06
.07
.06
2.38
NORMALS
FLAGSTAFF, AZ
1981 to 2010
Latitude:
350 08' N
Longitude: 1110 40' W
Elevation: 7006 Feet
OCTOBER
DATE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
TOTAL
AVG
TEMPERATURE
MAX
MIN AVG
68
36
52
67
36
52
67
36
51
66
35
51
66
35
50
66
35
50
65
34
50
65
34
49
65
34
49
64
33
49
64
33
48
63
33
48
63
32
48
63
32
47
62
32
47
62
31
47
62
31
46
61
31
46
61
31
46
61
30
45
60
30
45
60
30
45
60
29
44
59
29
44
59
29
44
58
29
44
58
28
43
58
28
43
57
28
43
57
28
42
57
27
42
62.0
31.5
DEGREE DAYS
HDD CDD
13
0
13
0
14
0
14
0
15
0
15
0
15
0
16
0
16
0
16
0
17
0
17
0
17
0
18
0
18
0
18
0
19
0
19
0
19
0
20
0
20
0
20
0
21
0
21
0
21
0
22
0
22
0
22
0
22
0
23
0
23
0
566
0
46.8
60
PRECIPITATION
DAILY
.06
.06
.06
.06
.06
.06
.05
.05
.05
.05
.05
.06
.05
.05
.06
.05
.06
.05
.06
.04
.05
.05
.04
.05
.05
.04
.06
.05
.06
.06
.06
1.66
NORMALS
FLAGSTAFF, AZ
1981 to 2010
Latitude:
350 08' N
Longitude: 1110 40' W
Elevation: 7006 Feet
NOVEMBER
DATE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
TOTAL
AVG
TEMPERATURE
MAX
MIN AVG
56
27
42
56
27
41
55
27
41
55
26
41
55
26
40
54
26
40
54
25
40
53
25
39
53
25
39
53
25
39
52
24
38
52
24
38
51
24
38
51
23
37
51
23
37
50
23
37
50
23
36
49
22
36
49
22
35
49
22
35
48
21
35
48
21
34
48
21
34
47
20
34
47
20
33
46
20
33
46
20
33
46
19
33
45
19
32
45
19
32
50.5
22.9
DEGREE DAYS
HDD CDD
23
0
24
0
24
0
24
0
25
0
25
0
25
0
26
0
26
0
26
0
27
0
27
0
27
0
28
0
28
0
29
0
29
0
29
0
30
0
30
0
30
0
31
0
31
0
31
0
32
0
32
0
32
0
32
0
33
0
33
0
849
0
36.7
61
PRECIPITATION
DAILY
.06
.06
.05
.06
.06
.06
.05
.06
.05
.06
.05
.06
.05
.05
.06
.06
.06
.06
.05
.07
.06
.06
.07
.07
.06
.07
.06
.06
.05
.06
1.76
NORMALS
FLAGSTAFF, AZ
1981 to 2010
Latitude:
350 08' N
Longitude: 1110 40' W
Elevation: 7006 Feet
DECEMBER
DATE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
TOTAL
AVG
TEMPERATURE
MAX
MIN AVG
45
19
32
45
18
31
44
18
31
44
18
31
44
18
31
44
18
31
43
17
30
43
17
30
43
17
30
43
17
30
43
17
30
43
17
30
42
17
30
42
17
29
42
16
29
42
16
29
42
16
29
42
16
29
42
16
29
42
16
29
42
16
29
42
16
29
42
16
29
42
16
29
42
16
29
42
16
29
42
16
29
42
16
29
42
17
29
42
17
29
42
17
29
42.5
16.8
DEGREE DAYS
HDD CDD
33
0
34
0
34
0
34
0
34
0
34
0
35
0
35
0
35
0
35
0
35
0
35
0
36
0
36
0
36
0
36
0
36
0
36
0
36
0
36
0
30
0
36
0
36
0
36
0
36
0
36
0
36
0
36
0
36
0
36
0
36
0
1096
0
29.6
62
PRECIPITATION
DAILY
.05
.06
.05
.06
.06
.05
.06
.06
.06
.06
.05
.06
.06
.06
.06
.05
.06
.06
.06
.06
.06
.06
.07
.06
.07
.06
.07
.06
.07
.07
.07
1.87
63