BUFFALO NY Latitude = 42.93 N Longitude = 78.73 W Period of Record = 1973 to 1996 WMO No. 725280 Elevation = 705 feet Average Pressure = 29.23 inches Hg Design Criteria Data Dry Bulb Temperature (T) Median of Extreme Highs 0.4% Occurrence 1.0% Occurrence 2.0% Occurrence Mean Daily Range 97.5% Occurrence 99.0% Occurrence 99.6% Occurrence Median of Extreme Lows Wet Bulb Temperature (Twb) Median of Extreme Highs 0.4% Occurrence 1.0% Occurrence 2.0% Occurrence Humidity Ratio (HR) Median of Extreme Highs 0.4% Occurrence 1.0% Occurrence 2.0% Occurrence Air Conditioning/ Humid Area Criteria Mean Coincident (Average) Values Wet Bulb Humidity Wind Temperature Ratio Speed (gr/lb) (mph) (oF) 72 93 13.1 70 90 12.8 70 88 12.6 69 86 12.4 9 7 12.3 5 6 12.2 2 5 12.0 -7 3 9.5 Mean Coincident (Average) Values Dry Bulb Humidity Wind Design Temperature Ratio Speed Value (gr/lb) (mph) (oF) (oF) 77 85 126 13.3 74 81 116 13.3 72 79 108 12.3 71 78 104 11.8 Mean Coincident (Average) Values Dry Bulb Vapor Wind Design Temperature Pressure Speed Value (in. Hg) (mph) (oF) (gr/lb) 135 83 0.88 12.4 120 80 0.79 11.2 113 77 0.74 12.3 107 73 0.69 12.1 T > 93oF T > 80oF Twb > 73oF # of Hours 2 290 87 Design Value (oF) 90 86 84 82 16 10 6 2 -7 Prevailing Direction (NSEW) WSW WSW WSW WSW W W W SE Prevailing Direction (NSEW) WSW WSW WSW SW Prevailing Direction (NSEW) WSW WSW SW SW Twb > 67oF 713 Other Site Data Rain Rate Basic Wind Speed Ventilation Cooling Load Index Weather 100 Year Recurrence 3 sec gust @ 33 ft (Ton-hr/cfm/yr) Base 75oF-RH 60% Region (in./hr) 50 Year Recurrence (mph) Latent + Sensible 6 2.3 90 0.9 + 0.3 Ground Water Frost Depth Ground Snow Load Average Annual Temperature (oF) 50 Year Recurrence 50 Year Recurrence Freeze-Thaw Cycles 50 Foot Depth * (in.) (lb/ft2) (#) 50.6 59 39 53 *Note: Temperatures at greater depths can be estimated by adding 1.5oF per 100 feet additional depth. BUFFALO WMO No. 725280 NY 120 15 110 14 100 13 90 12 80 11 70 10 60 9 50 8 40 7 30 6 20 5 10 4 0 3 -10 2 -20 1 -30 0 J F M A M Mean Precipitation J J Mean Temperature A S O Mean Dewpoint N D Precipitation (Inches) o Temperature ( F) Average Annual Climate BUFFALO WMO No. 725280 NY Long Term Psychrometric Summary 180 170 130 120 110 100 90 80 70 60 50 40 30 20 10 0 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 o Temperature ( F) 50% of all observations 80% of all observations 95% of all observations 97.5% of all observations 99% of all observations 80 90 100 110 120 Humidity Ratio (gr/lb) 160 150 140 BUFFALO WMO No. 725280 NY Psychrometric Summary of Peak Design Values 180 140 120 100 80 60 40 20 0 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 o Temperature ( F) 99% Dry Bulb (oF) 6 MCHR (gr/lb) 5.6 1.0% Dry Bulb (oF) 84 MCHR (gr/lb) 88.1 Enthalpy (btu/lb) 2.3 MCWB (oF) 69.6 1.0% Humidity (gr/lb) 113.4 Ratio Enthalpy (btu/lb) 34.0 MCDB (oF) 77.1 MCWB (oF) 72.1 MC Dewpt (oF) 70 Enthalpy (btu/lb) 36.2 Humidity Ratio (gr/lb) 160 BUFFALO WMO No. 725280 NY Dry-Bulb Temperature Hours For An Average Year (Sheet 1 of 5) Period of Record = 1973 to 1996 Temperature Range (oF) 95 / 99 90 / 94 85 / 89 80 / 84 75 / 79 70 / 74 65 / 69 60 / 64 55 / 59 50 / 54 45 / 49 40 / 44 35 / 39 30 / 34 25 / 29 20 / 24 15 / 19 10 / 14 5/ 9 0/ 4 -5 / -1 -10 / -6 -15 / -11 -20 / -16 January Hour Group (LST) 01 09 17 To To To Total 08 16 00 Obs 0 0 0 2 6 10 21 42 36 34 35 27 21 8 4 2 0 0 0 1 1 3 6 12 30 45 38 40 30 22 11 6 1 1 0 0 0 1 2 4 9 28 47 37 35 35 24 15 6 3 0 0 0 1 2 7 16 31 79 135 111 109 100 73 47 20 8 3 0 0 M C W B (oF) 57.6 55.3 50.9 47.3 41.6 38.4 33.9 29.9 24.9 20.2 15.7 10.9 6.4 1.6 -2.9 -7.0 -12.2 -16.0 February Hour Group (LST) 01 09 17 To To To Total 08 16 00 Obs 1 3 4 9 20 36 28 30 33 25 23 10 2 1 0 0 0 1 3 5 7 16 27 37 32 36 29 17 10 3 0 0 0 1 4 6 10 25 39 30 36 35 20 13 4 1 0 0 0 1 5 12 17 35 72 112 90 102 97 62 46 17 3 1 0 0 M C W B (oF) 57.0 51.7 48.7 46.2 42.0 38.0 34.1 30.1 24.8 20.2 15.6 10.9 6.2 1.6 -2.8 -7.0 -10.9 -15.8 March Hour Group (LST) 01 09 17 To To To Total 08 16 00 Obs 1 3 4 9 12 18 36 51 45 30 19 11 6 2 0 0 1 2 4 7 11 16 22 33 47 45 30 16 10 5 1 0 0 1 2 4 7 12 18 27 44 55 35 23 11 6 3 0 1 3 7 14 22 37 52 78 127 151 110 69 40 22 10 2 0 0 M C W B (oF) 60.0 56.3 54.5 51.4 49.3 45.6 41.8 37.9 33.8 29.7 24.8 20.1 15.5 10.8 6.7 1.6 -2.8 -5.5 Caution: This summary reflects the typical distribution of temperature in a typical year. It does not reflect the typical moisture distribution. Because wet bulb temperatures are averaged, this summary understates the annual moisture load. For accurate moisture load data, see the long-term humidity summary and the ventilation and infiltration load pages in this manual. BUFFALO WMO No. 725280 NY Dry-Bulb Temperature Hours For An Average Year (Sheet 2 of 5) Period of Record = 1973 to 1996 Temperature Range (oF) 95 / 99 90 / 94 85 / 89 80 / 84 75 / 79 70 / 74 65 / 69 60 / 64 55 / 59 50 / 54 45 / 49 40 / 44 35 / 39 30 / 34 25 / 29 20 / 24 15 / 19 10 / 14 5/ 9 0/ 4 -5 / -1 -10 / -6 -15 / -11 -20 / -16 April Hour Group (LST) 01 09 17 To To To Total 08 16 00 Obs 0 2 4 9 14 18 30 44 51 42 20 5 1 0 0 1 2 5 10 13 18 26 34 41 38 30 16 4 1 0 0 0 1 1 4 8 17 20 26 41 46 41 25 8 1 0 0 0 1 3 6 16 25 44 60 78 112 128 122 83 32 7 1 0 M C W B (oF) 64.4 64.0 63.1 61.0 58.4 55.5 52.6 49.2 45.3 41.9 38.4 34.1 29.9 25.2 20.5 15.9 11.0 May Hour Group (LST) 01 09 17 To To To 08 16 00 0 1 6 20 30 37 48 50 36 17 3 0 0 2 11 21 29 36 42 44 31 21 9 1 0 1 3 8 19 28 39 45 48 35 18 4 0 Total Obs M C W B (oF) 0 3 14 30 54 84 111 126 127 106 63 22 3 0 68.5 67.1 65.8 63.4 60.9 57.8 54.5 51.0 47.4 43.4 39.4 35.0 31.1 25.6 June Hour Group (LST) 01 09 17 To To To Total 08 16 00 Obs 0 0 1 0 1 9 2 11 1 29 12 42 6 48 27 81 25 58 46 129 49 48 57 154 55 28 50 134 53 13 30 96 33 5 12 50 14 1 4 19 3 0 3 0 0 M C W B (oF) 79.0 77.1 69.7 67.6 65.2 63.1 60.7 57.2 53.1 48.9 44.6 40.9 37.5 Caution: This summary reflects the typical distribution of temperature in a typical year. It does not reflect the typical moisture distribution. Because wet bulb temperatures are averaged, this summary understates the annual moisture load. For accurate moisture load data, see the long-term humidity summary and the ventilation and infiltration load pages in this manual. BUFFALO WMO No. 725280 NY Dry-Bulb Temperature Hours For An Average Year (Sheet 3 of 5) Period of Record = 1973 to 1996 Temperature Range (oF) 95 / 99 90 / 94 85 / 89 80 / 84 75 / 79 70 / 74 65 / 69 60 / 64 55 / 59 50 / 54 45 / 49 40 / 44 35 / 39 30 / 34 25 / 29 20 / 24 15 / 19 10 / 14 5/ 9 0/ 4 -5 / -1 -10 / -6 -15 / -11 -20 / -16 July Hour Group (LST) 01 09 17 To To To Total 08 16 00 Obs 0 0 0 3 0 3 0 22 7 29 3 56 25 84 20 75 58 153 57 58 74 189 68 24 52 144 59 8 24 91 33 1 7 41 9 1 10 0 0 M C W B (oF) 73.0 71.5 70.7 68.8 66.9 65.1 61.9 58.3 54.1 50.1 45.2 August Hour Group (LST) 01 09 17 To To To 08 16 00 2 12 47 64 63 39 17 3 1 0 2 14 45 72 61 36 14 3 0 0 0 3 16 45 74 57 36 14 3 1 Total Obs M C W B (oF) 2 17 63 128 182 158 113 56 20 4 1 0 73.7 71.8 68.9 67.4 65.5 62.1 58.5 54.1 49.8 45.4 41.2 37.0 September Hour Group (LST) 01 09 17 To To To Total 08 16 00 Obs 0 4 18 29 38 52 50 30 14 5 0 2 12 29 44 50 47 32 18 4 0 0 3 13 30 42 47 51 33 15 5 1 2 15 46 92 121 132 135 101 49 19 6 0 M C W B (oF) 71.8 69.1 66.5 64.5 60.8 56.7 53.1 48.8 44.4 40.1 36.0 32.3 Caution: This summary reflects the typical distribution of temperature in a typical year. It does not reflect the typical moisture distribution. Because wet bulb temperatures are averaged, this summary understates the annual moisture load. For accurate moisture load data, see the long-term humidity summary and the ventilation and infiltration load pages in this manual. BUFFALO WMO No. 725280 NY Dry-Bulb Temperature Hours For An Average Year (Sheet 4 of 5) Period of Record = 1973 to 1996 Temperature Range (oF) 95 / 99 90 / 94 85 / 89 80 / 84 75 / 79 70 / 74 65 / 69 60 / 64 55 / 59 50 / 54 45 / 49 40 / 44 35 / 39 30 / 34 25 / 29 20 / 24 15 / 19 10 / 14 5/ 9 0/ 4 -5 / -1 -10 / -6 -15 / -11 -20 / -16 October Hour Group (LST) 01 09 17 To To To Total 08 16 00 Obs 1 7 16 28 38 53 48 38 15 4 0 1 5 13 22 36 43 47 44 26 8 1 0 1 4 11 24 37 50 54 41 22 5 1 1 6 18 40 76 108 135 151 115 68 21 5 0 M C W B (oF) 65.1 62.4 60.2 58.1 55.2 51.4 47.2 43.2 38.9 34.8 30.4 26.0 22.4 November Hour Group (LST) 01 09 17 To To To Total 08 16 00 Obs 0 1 7 11 19 24 36 48 51 30 10 3 0 1 7 12 15 25 32 44 47 38 13 3 1 0 0 2 7 15 21 30 42 48 46 21 6 1 0 1 10 26 41 65 86 123 144 136 64 19 5 0 M C W B (oF) 60.7 57.1 54.9 51.9 47.4 42.8 38.4 33.8 29.6 25.4 20.6 16.4 11.6 December Hour Group (LST) 01 09 17 To To To Total 08 16 00 Obs 0 1 3 5 8 13 39 54 40 32 24 17 8 3 1 1 0 1 1 4 6 10 24 51 52 35 27 22 9 4 1 0 0 0 0 0 1 3 4 10 17 45 56 40 29 23 11 6 3 0 0 0 1 3 10 15 28 54 135 162 115 88 69 37 18 7 1 1 0 M C W B (oF) 62.9 60.0 56.2 52.2 47.6 43.0 38.1 34.0 30.0 25.0 20.3 15.7 11.1 6.5 2.3 -2.7 -7.1 -10.0 Caution: This summary reflects the typical distribution of temperature in a typical year. It does not reflect the typical moisture distribution. Because wet bulb temperatures are averaged, this summary understates the annual moisture load. For accurate moisture load data, see the long-term humidity summary and the ventilation and infiltration load pages in this manual. WMO No. 725280 BUFFALO NY Dry-Bulb Temperature Hours For An Average Year (Sheet 5 of 5) Period of Record = 1973 to 1996 Temperature Range (oF) 95 / 99 90 / 94 85 / 89 80 / 84 75 / 79 70 / 74 65 / 69 60 / 64 55 / 59 50 / 54 45 / 49 40 / 44 35 / 39 30 / 34 25 / 29 20 / 24 15 / 19 10 / 14 5/ 9 0/ 4 -5 / -1 -10 / -6 -15 / -11 -20 / -16 Annual Totals Hour Group (LST) 01 09 17 To To To Total 08 16 00 Obs 0 0 0 6 1 7 0 50 13 63 6 156 59 221 44 253 152 449 155 276 252 684 242 241 259 742 280 215 248 743 274 197 231 702 250 192 215 657 234 189 217 640 231 204 216 651 277 243 258 778 294 236 273 803 201 153 172 526 142 125 130 396 116 93 107 316 80 53 62 195 58 25 37 120 23 10 13 46 7 2 4 13 5 1 1 7 1 0 0 1 0 0 M C W B (oF) 73.5 73.0 70.6 68.4 66.3 64.1 60.5 56.3 52.0 47.4 42.9 38.6 34.1 29.9 25.0 20.2 15.7 11.0 6.4 1.7 -2.8 -7.0 -11.6 -15.9 Caution: This summary reflects the typical distribution of temperature in a typical year. It does not reflect the typical moisture distribution. Because wet bulb temperatures are averaged, this summary understates the annual moisture load. For accurate moisture load data, see the long-term humidity summary and the ventilation and infiltration load pages in this manual. 1.0% Dry Bulb Temp MCWB (1% Dry Bulb) Mean Max Temp Mean Min Temp 23-Dec 9-Dec 25-Nov 11-Nov 28-Oct 14-Oct 30-Sep 16-Sep 2-Sep 19-Aug 5-Aug 22-Jul 8-Jul 24-Jun 10-Jun 27-May NY 13-May 29-Apr 15-Apr 1-Apr 18-Mar 4-Mar 18-Feb 4-Feb 21-Jan 7-Jan o Temperature ( F) BUFFALO WMO No. 725280 Annual Summary of Temperatures 100 90 80 70 60 50 40 30 20 10 0 -10 99% Min Dry Bulb Temp BUFFALO WMO No. 725280 NY 1.0% Max HR Mean Max HR Mean Min HR MCDB Temp (1% Max HR) 23-Dec 9-Dec 25-Nov 11-Nov 28-Oct 14-Oct 30-Sep 16-Sep 2-Sep 19-Aug 5-Aug 22-Jul 8-Jul 24-Jun 10-Jun 27-May 13-May 29-Apr 15-Apr 1-Apr 18-Mar 4-Mar 18-Feb 4-Feb o Dry Bulb Temperature ( F) 110 105 100 95 90 85 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 0 21-Jan 220 210 200 190 180 170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 7-Jan Humidity Ratio (gr/lb) Long Term Humidity and Dry Bulb Temperature Summary BUFFALO Week 1.0% Ending Temp (oF) 7-Jan 51.0 14-Jan 53.0 21-Jan 54.0 28-Jan 49.0 4-Feb 54.0 11-Feb 49.0 18-Feb 55.0 25-Feb 58.0 4-Mar 56.0 11-Mar 61.0 18-Mar 66.0 25-Mar 65.0 1-Apr 71.0 8-Apr 70.0 15-Apr 72.0 22-Apr 78.0 29-Apr 80.0 6-May 74.0 13-May 82.0 20-May 82.0 27-May 84.0 3-Jun 83.0 10-Jun 84.0 17-Jun 88.0 24-Jun 86.0 1-Jul 86.0 8-Jul 90.0 15-Jul 88.0 22-Jul 88.0 29-Jul 88.0 5-Aug 88.0 12-Aug 86.0 19-Aug 88.0 26-Aug 84.0 2-Sep 86.0 9-Sep 84.0 16-Sep 83.0 23-Sep 80.0 30-Sep 76.0 7-Oct 77.0 14-Oct 72.0 21-Oct 73.0 28-Oct 74.0 4-Nov 69.0 11-Nov 66.0 18-Nov 64.0 25-Nov 64.0 2-Dec 65.0 9-Dec 60.0 16-Dec 58.0 23-Dec 53.0 31-Dec 58.0 WMO No. 725280 NY Long Term Dry Bulb Temperature and Humidity Summary MCWB @ 1% Temp (oF) 48.0 49.2 49.3 42.5 47.8 42.8 48.4 49.9 47.7 51.5 54.5 52.4 55.3 55.8 58.1 62.3 62.4 57.5 65.6 62.5 67.6 67.3 69.3 71.1 68.5 70.3 72.9 72.4 72.0 69.9 73.3 72.1 73.7 68.9 73.0 70.6 68.5 69.5 63.8 63.2 59.8 61.4 62.3 56.9 55.8 54.9 56.9 55.6 56.5 52.3 50.5 54.4 Mean Max Temp (oF) 30.8 29.3 30.1 32.3 29.6 27.6 31.6 38.8 34.4 39.4 41.6 43.4 49.0 48.1 52.1 57.5 59.4 59.8 64.4 67.5 69.8 71.3 72.9 75.9 76.6 77.0 79.8 79.8 81.5 80.0 79.7 78.3 78.9 76.9 76.4 74.1 70.9 67.1 65.5 62.7 59.5 57.5 56.9 54.6 49.1 46.2 44.7 42.3 38.3 36.5 33.5 33.1 Mean Min Temp (oF) 19.0 16.5 16.9 20.3 17.3 14.1 17.7 24.6 20.3 24.4 25.5 27.4 32.4 32.9 34.6 39.4 41.0 42.3 45.4 48.3 51.8 53.6 55.1 57.5 58.9 59.6 62.4 62.6 64.2 62.5 63.4 61.9 60.9 58.7 59.8 57.1 53.9 51.1 48.4 46.6 43.5 42.0 41.3 39.6 35.8 33.0 32.5 30.0 26.3 24.3 22.2 21.0 99% Temp (oF) 2.0 -1.0 -5.0 1.0 1.0 -1.0 -3.0 6.0 3.0 7.0 9.0 11.0 17.0 19.0 24.0 28.0 32.0 34.0 35.0 38.0 41.0 43.0 44.0 47.0 48.0 51.0 53.0 55.0 55.0 54.0 55.0 53.0 51.0 49.0 48.0 45.0 43.0 40.0 37.0 35.0 32.0 30.0 31.0 26.0 23.0 22.0 19.0 15.0 9.0 5.0 3.0 2.0 1.0% MCDB @ HR (gr/lb) 1% HR (oF) 49.0 54.4 50.4 53.3 51.1 50.4 39.9 45.0 42.0 49.0 36.4 43.3 48.3 53.6 52.5 51.3 51.8 58.5 51.8 56.2 59.5 56.8 55.3 58.9 62.3 55.9 68.6 63.2 67.2 67.9 76.3 63.5 74.2 66.3 73.5 64.6 88.2 74.6 88.9 70.5 101.5 76.0 106.4 74.1 109.2 74.9 124.6 82.5 121.8 76.4 109.9 77.2 121.8 79.9 125.3 80.2 126.7 79.4 121.8 77.7 126.0 79.1 122.5 78.0 126.0 82.4 114.1 77.8 121.1 80.2 117.6 74.1 113.4 78.8 109.9 77.3 105.7 71.6 86.8 66.3 79.8 64.7 79.8 67.2 79.8 69.0 76.3 61.4 71.4 62.8 63.7 59.6 65.8 63.6 65.1 58.3 62.3 56.8 51.1 57.4 49.0 48.8 61.6 57.1 Mean Max HR (gr/lb) 21.4 20.3 21.8 22.2 20.0 18.0 21.2 28.1 22.1 27.6 28.5 29.1 34.8 35.6 36.9 44.4 44.4 46.4 52.7 61.2 65.9 71.8 75.0 79.9 87.0 86.3 93.3 94.4 98.3 95.9 98.2 95.5 95.0 89.1 91.9 83.2 78.3 71.8 64.2 58.5 52.4 49.2 47.4 44.8 40.5 35.2 34.9 32.8 28.8 26.8 24.0 25.0 Mean Min HR (gr/lb) 11.8 10.8 11.8 12.6 11.0 9.7 12.0 15.9 12.5 15.5 15.8 16.8 20.7 21.4 21.8 27.0 27.5 28.6 33.5 38.9 44.5 48.2 50.4 54.5 58.7 59.4 66.4 63.7 68.6 66.1 70.9 66.5 66.2 60.7 64.2 58.1 50.3 48.4 43.1 38.3 34.1 30.9 30.1 27.8 24.3 21.4 21.1 18.7 16.2 15.3 13.9 13.5 BUFFALO WMO No. 725280 NY Degree Days, Heating and Cooling o (Base 65 F) 1000 500 -500 o Degree Days ( F) 0 -1000 -1500 -2000 -2500 -3000 J F M A M J Mean Cooling Degree Days JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN Mean Cooling Degree Days (oF) 0 0 2 12 48 128 231 188 70 11 1 0 690 J A S O Mean Heating Degree Days Mean Heating Degree Days (oF) 1257 1127 955 600 293 90 28 45 178 457 737 1093 6860 N D BUFFALO WMO No. 725280 NY Average Ventilation and Infiltration Loads o o (Outside Air vs. 75 F, 60% RH summer; 68 F, 30% RH winter) 40000 30000 20000 10000 Load (Btu/cfm) 0 -10000 -20000 -30000 -40000 -50000 -60000 -70000 -80000 J F M A M J J A S O N D Average Sensible Cooling Load Average Sensible Heating Load Average Latent Cooling (Drying) Load Average Latent Heating (Humidifying) Load Average Sensible Cooling Load (Btu/cfm) JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN 0 0 1 38 189 601 1309 895 215 11 0 0 3259 Average Sensible Heating Load (Btu/cfm) -34995 -31417 -27152 -17761 -9539 -3503 -1345 -1973 -6217 -14110 -21413 -30742 -200167 Average Latent Cooling Load (Btu/cfm) 0 0 0 1 314 1661 3914 3639 1348 31 1 0 10909 Average Latent Heating Load (Btu/cfm) -7782 -7029 -5385 -2556 -536 -19 -1 -1 -62 -918 -3112 -6165 -33566 Average Annual Solar Radiation – Nearest Available Site (Source: National Renewable Energy Laboratory, Golden CO, 1995) City: State: WBAN No: Lat(N): Long(W): Elev(ft): BUFFALO NY 14733 42.93 78.73 705 Stn Type: Secondary SHADING GEOMETRY IN DIMENSIONLESS UNITS Window: 1 Overhang: 0.618 Vert Gap: 0.33 AVERAGE INCIDENT SOLAR RADIATION (Btu/sq.ft./day), Percentage Uncertainty = Jan Feb Mar Apr May HORIZ Global 500 740 1070 1440 1740 Std Dev 40 59 85 119 157 Minimum 430 640 940 1140 1360 Maximum 580 870 1270 1640 2060 Diffuse 360 500 600 700 790 Clear Day Global 790 1150 1640 2170 2510 NORTH Global 190 270 340 430 530 Diffuse 190 270 340 420 490 Clear Day Global 170 230 310 420 570 EAST Global 320 460 660 860 990 Diffuse 240 330 420 510 580 Clear Day Global 630 850 1110 1350 1480 SOUTH Global 680 850 970 940 870 Diffuse 360 440 490 530 560 Clear Day Global 1850 1990 1870 1510 1180 WEST Global 320 470 650 850 1000 Diffuse 240 330 420 510 590 Clear Day Global 630 850 1110 1350 1480 9 Jun 1940 134 1610 2200 840 2650 610 530 690 1070 620 1520 840 580 1040 1090 630 1520 Jul 1910 109 1700 2110 820 2560 590 520 640 1070 620 1480 870 580 1090 1090 630 1480 Aug 1640 101 1460 1870 740 2240 470 450 460 960 550 1360 970 560 1340 970 560 1360 Sep 1240 110 1070 1430 600 1770 360 360 340 760 450 1160 1000 500 1680 770 450 1160 Oct 840 73 700 1060 450 1240 270 270 250 540 320 880 940 410 1860 540 330 880 Nov 500 42 420 590 340 830 190 190 170 320 220 650 630 310 1810 310 220 650 Dec 400 38 330 480 300 670 160 160 150 260 190 550 550 290 1740 260 190 550 Year 1170 39 1080 1260 590 1690 370 350 370 690 420 1090 840 470 1580 700 430 1090 Average Annual Solar Heat and Illumination – Nearest Available Site (Source: National Renewable Energy Laboratory, Golden CO, 1995) AVERAGE TRANSMITTED SOLAR RADIATION (Btu/sq.ft./day) FOR DOUBLE GLAZING, Percentage Uncertainty = 9 Jan Feb Mar Apr May Jun Jul Aug Sep HORIZ Unshaded 330 510 750 1030 1260 1410 1380 1180 880 NORTH Unshaded 130 190 240 290 350 400 380 320 250 Shaded 110 150 200 250 310 350 330 280 220 EAST Unshaded 220 330 470 610 700 760 760 680 540 Shaded 190 270 400 510 570 620 630 570 450 SOUTH Unshaded 510 620 680 630 550 520 540 630 690 Shaded 480 550 520 390 340 350 350 370 480 WEST Unshaded 220 330 460 610 710 780 780 690 550 Shaded 190 280 390 510 590 640 640 580 460 Oct 570 180 160 380 320 680 580 380 320 Nov 330 130 110 220 190 470 440 220 180 AVERAGE INCIDENT ILLUMINANCE (klux-hr) FOR MOSTLY CLEAR AND MOSTLY CLOUDY CONDITIONS, Percentage Uncertainty = 9 March June 9am 11am 1pm 3pm 5pm 9am 11am 1pm HORIZ. M.Clear 33 66 78 63 29 44 80 98 M.Cloudy 19 39 46 38 17 27 51 67 NORTH M.Clear 9 13 14 13 8 18 16 17 M.Cloudy 8 14 16 14 7 12 16 18 EAST M.Clear 70 59 14 13 8 77 74 35 M.Cloudy 23 29 16 14 7 32 41 28 SOUTH M.Clear 36 73 86 70 32 11 33 51 M.Cloudy 14 33 39 31 13 10 24 37 WEST M.Clear 9 13 17 62 68 11 16 17 M.Cloudy 8 14 17 29 21 10 16 18 M.Clear (% hrs) 23 21 19 19 21 37 33 31 Sept Dec 9am 11am 1pm 3pm 5pm 9am 11am 1pm HORIZ. M.Clear 23 60 79 75 49 8 32 40 M.Cloudy 13 35 50 48 29 5 19 23 NORTH M.Clear 7 13 15 15 12 4 9 10 M.Cloudy 6 13 16 16 11 3 8 10 EAST M.Clear 57 70 32 15 12 24 37 10 M.Cloudy 18 32 23 16 11 6 14 10 SOUTH M.Clear 17 55 76 71 43 21 71 83 M.Cloudy 8 27 41 39 21 5 21 25 WEST M.Clear 7 13 15 47 73 4 9 16 M.Cloudy 6 13 16 29 30 3 8 11 M.Clear (% hrs) 35 28 26 27 32 11 11 11 Dec 260 110 91 170 150 410 390 170 150 Year 830 250 210 490 410 580 430 490 410 3pm 95 65 17 18 17 18 48 35 47 34 33 5pm 71 48 15 16 15 16 26 21 78 45 33 3pm 25 15 8 7 8 7 57 17 40 13 11 5pm 2 2 1 1 1 1 6 2 8 2 12 Wind Summary - December, January, and February Labels of Percent Frequency on North Axis N NNW 20 NNE 15 NW NE 10 WNW ENE 5 0 W E WSW ESE SW SE SSW SSE S >34 knots 25-34 knots 15-24 knots 6-14 knots 1-5 knots Percent Calm = 1.94 Wind Summary - March, April, and May Labels of Percent Frequency on North Axis N NNW 20 NNE 15 NW NE 10 WNW ENE 5 0 W E WSW ESE SW SE SSW SSE S >34 knots Percent Calm = 1.97 25-34 knots 15-24 knots 6-14 knots 1-5 knots Wind Summary - June, July, and August Labels of Percent Frequency on North Axis N NNW 20 NNE 15 NW NE 10 WNW ENE 5 0 W E WSW ESE SE SW SSW SSE S >34 knots 25-34 knots 15-24 knots 6-14 knots 1-5 knots Percent Calm = 2.66 Wind Summary - September, October, and November Labels of Percent Frequency on North Axis N NNW NW WNW W 14 12 10 8 6 4 2 0 NNE NE ENE E WSW ESE SE SW SSW SSE S >34 knots Percent Calm = 2.26 25-34 knots 15-24 knots 6-14 knots 1-5 knots
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