LOUISVILLE/STANDIFORD KY Latitude = 38.18 N WMO No. 72423 Longitude = 85.73 W Elevation = 489 feet Period of Record = 1973 to 1996 Average Pressure = 29.49 inches Hg Design Criteria Data Mean Coincident (Average) Values Design Wet Bulb Humidity Wind Prevailing Value Temperature Ratio Speed Direction Dry Bulb Temperature (T) ( o F) ( o F) (gr/lb) (mph) (NSEW) Median of Extreme Highs 96 77 112 9.9 W.4% Occurrence 93 77 114 9.5 WSW 1.% Occurrence 91 76 112 9.4 WSW 2.% Occurrence 89 75 9 9.3 WSW Mean Daily Range 18 - - - - 97.5% Occurrence 19 17 9 9. WNW 99.% Occurrence 12 11 7 8.9 WNW 99.6% Occurrence 6 5 5 9.4 W Median of Extreme Lows 2 1 4 9.8 W Mean Coincident (Average) Values Design Dry Bulb Humidity Wind Prevailing Value Temperature Ratio Speed Direction Wet Bulb Temperature (T wb ) ( o F) ( o F) (gr/lb) (mph) (NSEW) Median of Extreme Highs 81 92 14 8.8 WSW.4% Occurrence 79 89 132 9.1 W 1.% Occurrence 78 88 128 8.9 W 2.% Occurrence 76 85 121 8.3 S Mean Coincident (Average) Values Design Dry Bulb Vapor Wind Prevailing Value Temperature Pressure Speed Direction Humidity Ratio (HR) (gr/lb) ( o F) (in. Hg) (mph) (NSEW) Median of Extreme Highs 147 86.97 4.7 SW.4% Occurrence 137 86.9 7.9 S 1.% Occurrence 13 83.85 7.7 S 2.% Occurrence 125 82.82 7.6 S Air Conditioning/ T > 93 o F T > 8 o F T wb > 73 o F T wb > 67 o F Humid Area Criteria # of Hours 46 993 734 1965 Other Site Data Rain Rate Basic Wind Speed Ventilation Cooling Load Index Weather Year Recurrence 3 sec gust @ 33 ft (Ton-hr/cfm/yr) Base 75 o F-RH 6% Region (in./hr) 5 Year Recurrence (mph) Latent + Sensible 7 3.2 9 3. + 1. Ground Water Frost Depth Ground Snow Load Average Annual Temperature ( o F) 5 Year Recurrence 5 Year Recurrence Freeze-Thaw Cycles 5 Foot Depth * (in.) (lb/ft 2 ) (#) 59.1 32 12 45 *Note: Temperatures at greater depths can be estimated by adding 1.5 o F per feet additional depth.
Average Annual Climate Temperature ( o F) 12 1 9 8 7 6 5 4 3 2 - -2-3 J F M A M J J A S O N D Mean Precipitation Mean Temperature Mean Dewpoint 15 14 13 12 11 9 8 7 6 5 4 3 2 1 Precipitation (Inches)
Long Term Psychrometric Summary -6-5 -4-3 -2-2 3 4 5 6 7 8 9 1 12 18 17 16 15 14 13 12 1 9 8 7 6 5 4 3 2 Humidity Ratio (gr/lb) Temperature ( o F) 5% of all observations 8% of all observations 95% of all observations 97.5% of all observations 99% of all observations
Psychrometric Summary of Peak Design Values 18 16-6 -5-4 -3-2 - 2 3 4 5 6 7 8 9 1 12 14 12 8 6 4 2 Humidity Ratio (gr/lb) Temperature ( o F) MCHR Enthalpy MCDB MCWB MC Dewpt Enthalpy ( o F) (gr/lb) (btu/lb) 1.% Humidity (gr/lb) ( o F) ( o F) ( o F) (btu/lb) 99% Dry Bulb 12 6.9 3.9 Ratio 129.5 83 76.5 74 4.2 MCHR MCWB Enthalpy ( o F) (gr/lb) ( o F) (btu/lb) 1.% Dry Bulb 91 112.7 76 39.6
Dry-Bulb Temperature Hours For An Average Year (Sheet 1 of 5) Period of Record = 1973 to 1996 January February March Hour M Hour M Hour M Group (LST) C Group (LST) C Group (LST) C Temperature 1 9 17 W 1 9 17 W 1 9 17 W Range To To To Total B To To To Total B To To To Total B ( o F) 8 16 Obs ( o F) 8 16 Obs ( o F) 8 16 Obs ( o F) / 4 95 / 99 9 / 94 85 / 89 6.5 8 / 84 2 1 3 63.1 75 / 79 61.7 7 4 11 6.7 7 / 74 58.6 1 1 2 57.8 1 13 24 59.1 65 / 69 1 1 2 58.7 5 3 8 54.7 5 17 15 37 56.3 6 / 64 2 5 4 11 55.2 5 11 9 25 53.7 15 23 23 61 53.5 55 / 59 4 8 8 2 51.3 8 16 14 38 5.2 2 3 3 8 5. 5 / 54 9 14 11 34 46.4 19 19 48 45.7 25 34 34 93 45.7 45 / 49 11 19 19 49 42.1 16 24 24 64 41.8 29 35 38 2 41.7 4 / 44 2 3 26 76 37.9 21 29 33 84 37.6 39 31 36 6 37.6 35 / 39 36 47 46 13 33.9 36 33 35 5 33.4 42 29 28 99 33.2 3 / 34 51 43 48 143 29.3 44 3 31 6 29.1 39 17 2 76 29.1 25 / 29 39 3 33 3 24.5 32 23 24 79 24.5 2 6 7 33 24.5 2 / 24 29 2 22 71 19.8 15 14 15 44 19.4 9 2 2 13 2.2 15 / 19 19 13 14 46 15.3 16 9 35 15.2 3 1 1 5 14.9 / 14 13 8 7 28.7 13 5 4 22.8 1 1 2 11. 5 / 9 7 4 4 15 5.8 6 2 1 9 6.4 6.3 / 4 5 2 2 9 1.4 2 2 1.7 2.3-5 / -1 2 1 1 4-3.6-3.9 - / -6 1 1 1 3-8. -6. -15 / -11 1 1-12.1-2 / -16-17.4-25 / -21-2.8 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.
Dry-Bulb Temperature Hours For An Average Year (Sheet 2 of 5) Period of Record = 1973 to 1996 April May June Hour M Hour M Hour M Group (LST) C Group (LST) C Group (LST) C Temperature 1 9 17 W 1 9 17 W 1 9 17 W Range To To To Total B To To To Total B To To To Total B ( o F) 8 16 Obs ( o F) 8 16 Obs ( o F) 8 16 Obs ( o F) / 4 76.5 95 / 99 1 1 2 75.3 9 / 94 72. 72.2 14 6 2 74.8 85 / 89 3 1 4 66.2 14 5 19 71.2 47 24 71 72.7 8 / 84 13 6 19 64.6 32 18 5 68.6 4 63 48 115 7.7 75 / 79 19 13 32 62.2 3 45 34 82 65.9 27 53 57 137 68.6 7 / 74 5 31 23 59 6. 22 52 49 123 63.3 74 37 57 168 66.4 65 / 69 18 31 33 82 57.4 5 43 52 146 6.7 63 17 31 111 62.7 6 / 64 31 36 39 6 54.1 53 29 41 124 56.6 42 6 12 6 58.2 55 / 59 28 33 36 97 49.9 43 19 26 89 52. 21 1 3 25 53.9 5 / 54 42 32 36 1 46.1 41 15 67 48.1 8 1 9 49.9 45 / 49 43 23 26 92 42.1 24 3 5 32 44.1 1 1 46.8 4 / 44 39 13 16 68 38.1 9 1 39.5 35 / 39 22 5 8 35 33.6 2 2 35.5 3 / 34 11 1 1 13 29.2 32.3 25 / 29 2 2 25.6 2 / 24 2.8 15 / 19 / 14 5 / 9 / 4-5 / -1 - / -6-15 / -11-2 / -16-25 / -21 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.
Dry-Bulb Temperature Hours For An Average Year (Sheet 3 of 5) Period of Record = 1973 to 1996 July August September Hour M Hour M Hour M Group (LST) C Group (LST) C Group (LST) C Temperature 1 9 17 W 1 9 17 W 1 9 17 W Range To To To Total B To To To Total B To To To Total B ( o F) 8 16 Obs ( o F) 8 16 Obs ( o F) 8 16 Obs ( o F) / 4 1 1 75.5 76.2 95 / 99 6 3 9 77.5 4 1 5 77.1 75.1 9 / 94 35 17 52 76.5 28 38 76.6 7 2 9 74.9 85 / 89 1 63 39 3 74.3 53 3 83 74.2 24 9 33 72.7 8 / 84 16 71 66 153 72.2 7 66 58 131 72. 41 25 65 7.4 75 / 79 61 46 67 173 7.8 45 57 7 171 7.4 12 48 45 4 68.2 7 / 74 98 22 45 165 68.3 96 31 55 182 68.2 49 48 56 152 66.4 65 / 69 5 4 64 63.7 59 8 2 87 63.7 5 35 44 129 62.3 6 / 64 2 2 22 59.2 33 1 3 37 59.6 43 23 31 97 57.7 55 / 59 3 3 54.6 8 8 55.1 44 18 72 53.6 5 / 54 53. 1 1 49.1 27 4 9 4 49.3 45 / 49 45. 11 2 13 45.1 4 / 44 4 4 4.7 35 / 39 37.5 3 / 34 25 / 29 2 / 24 15 / 19 / 14 5 / 9 / 4-5 / -1 - / -6-15 / -11-2 / -16-25 / -21 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.
Dry-Bulb Temperature Hours For An Average Year (Sheet 4 of 5) Period of Record = 1973 to 1996 October November December Hour M Hour M Hour M Group (LST) C Group (LST) C Group (LST) C Temperature 1 9 17 W 1 9 17 W 1 9 17 W Range To To To Total B To To To Total B To To To Total B ( o F) 8 16 Obs ( o F) 8 16 Obs ( o F) 8 16 Obs ( o F) / 4 95 / 99 9 / 94 85 / 89 1 1 68.6 8 / 84 9 2 11 67.6 6.9 75 / 79 1 23 9 33 65.1 3 1 4 62.7 64. 7 / 74 6 34 24 64 62.3 1 12 5 18 61.3 1 1 2 63. 65 / 69 17 41 37 95 59.6 7 18 16 41 59.5 1 5 2 8 58.9 6 / 64 31 41 46 118 55.9 16 24 23 63 56. 7 9 9 25 56.3 55 / 59 38 39 41 118 51.7 22 29 26 77 51.1 13 15 12 4 52.4 5 / 54 44 32 41 117 47.4 27 36 34 97 46.9 12 19 17 48 46.7 45 / 49 46 18 3 94 43.5 31 36 37 4 42.4 15 3 25 7 42.7 4 / 44 35 6 11 52 39.5 35 36 4 111 37.9 28 43 42 113 38.3 35 / 39 23 2 5 3 35.3 44 27 35 6 33.5 43 46 49 138 33.9 3 / 34 7 1 8 3.8 31 13 18 62 29.4 46 33 4 119 29.2 25 / 29 1 1 25.8 21 4 5 3 25.1 36 22 24 82 24.7 2 / 24 23. 5 1 1 7 2.6 21 13 44 2.1 15 / 19 1 1 15.5 12 8 8 28 15.3 / 14 9.8 7 4 4 15.5 5 / 9 8. 4 2 2 8 6. / 4 1 1 1 3 1. -5 / -1 1 1 2-3.1 - / -6 1 1-7.3-15 / -11-12.6-2 / -16-15. -25 / -21 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.
Dry-Bulb Temperature Hours For An Average Year (Sheet 5 of 5) Period of Record = 1973 to 1996 Annual Totals Hour M Group (LST) C Temperature 1 9 17 W Range To To To Total B ( o F) 8 16 Obs ( o F) / 4 1 1 75.7 95 / 99 12 5 17 77. 9 / 94 85 34 119 76.1 85 / 89 1 24 9 314 73.5 8 / 84 28 295 223 546 7.9 75 / 79 148 299 298 746 68.6 7 / 74 35 279 324 954 65.7 65 / 69 318 226 262 87 6.9 6 / 64 296 29 241 746 56.2 55 / 59 252 23 215 67 51.5 5 / 54 243 2 216 659 46.9 45 / 49 226 189 27 622 42.5 4 / 44 229 19 26 625 38.1 35 / 39 25 191 27 648 33.7 3 / 34 23 141 161 532 29.2 25 / 29 152 87 95 335 24.6 2 / 24 8 47 54 181 19.9 15 / 19 5 3 33 113 15.3 / 14 34 17 15 66.7 5 / 9 19 8 8 35 6. / 4 9 3 3 15 1.4-5 / -1 3 2 1 6-3.4 - / -6 2 1 1 4-7.7-15 / -11 1 1 2-12.2-2 / -16-17.2-25 / -21-2.8 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.
Annual Summary of Temperatures 1 9 8 7 6 5 4 3 2 - -2 31-Dec 14-Jan 28-Jan 11-Feb 25-Feb 11-Mar 25-Mar 8-Apr 22-Apr 6-May 2-May 3-Jun 17-Jun 1-Jul 15-Jul 29-Jul 12-Aug 26-Aug 9-Sep 23-Sep 7-Oct 21-Oct 4-Nov 18-Nov 2-Dec 16-Dec Temperature ( o F) 1.% Dry Bulb Temp MCWB (1% Dry Bulb) Mean Max Temp Mean Min Temp 99% Min Dry Bulb Temp
Long Term Humidity and Dry Bulb Temperature Summary 22 2 2 19 18 17 16 15 14 13 12 1 9 8 7 6 5 4 3 2 1 5 95 9 85 8 75 7 65 6 55 5 45 4 35 3 25 2 15 5 7-Jan 21-Jan 4-Feb 18-Feb 4-Mar 18-Mar 1-Apr 15-Apr 29-Apr 13-May 27-May -Jun 24-Jun 8-Jul 22-Jul 5-Aug 19-Aug 2-Sep 16-Sep 3-Sep 14-Oct 28-Oct Humidity Ratio (gr/lb) 11-Nov 25-Nov 9-Dec 23-Dec Dry Bulb Temperature ( o F) 1.% Max HR Mean Max HR Mean Min HR MCDB Temp (1% Max HR)
Long Term Dry Bulb Temperature and Humidity Summary Week 1.% MCWB @ Mean Max Mean Min 99% 1.% MCDB @ Mean Max Mean Min Ending Temp ( o F) 1% Temp ( o F) Temp ( o F) Temp ( o F) Temp ( o F) HR (gr/lb) 1% HR ( o F) HR (gr/lb) HR (gr/lb) 7-Jan 59. 55.1 39.4 26.2 8. 62.3 56.5 27.7 16.1 14-Jan 61. 57.6 38.4 23.6 1. 71.4 59.5 26.5 14.7 21-Jan 62. 55.4 39.8 24.8 -. 67.9 61. 29. 16.8 28-Jan 61. 51.9 42.3 25.7 5. 57.4 54.3 28.5 15.8 4-Feb 63. 55.4 42. 26.1 2. 7. 59.6 28.4 16.4 11-Feb 61. 52.6 4.2 23.5 5. 63.7 59. 25.6 14.3 18-Feb 66. 58.3 45.5 29. 9. 7. 62.5 32.9 18.7 25-Feb 69. 53.6 52. 33.9 12. 67.9 59.3 37.5 21.2 4-Mar 74. 6.7 5.7 32.8 13. 76.3 66.3 33.8 19.5 11-Mar 75. 61.7 54.1 35.4 16. 78.4 66.9 39.6 23.2 18-Mar 76. 61.1 56.4 37.4 23. 81.9 67.5 42.3 23.6 25-Mar 75. 58.2 57.5 38.3 24. 79.1 67.2 42.1 24.4 1-Apr 79. 61.5 61.2 43. 29. 81.2 68.4 48.3 29.9 8-Apr 79. 61.1 61.8 42.3 3. 85.4 69.5 47.2 27.9 15-Apr 82. 65.4 65.4 44.9 32. 85.4 73.2 51.6 31.2 22-Apr 83. 64.6 69. 48.7 34. 88.2 7.3 58.8 38. 29-Apr 85. 66.3 7.3 49.9 38. 97.3 72.8 6. 39.5 6-May 82. 65.2 7.5 51.2 4. 98. 73. 64.4 41.7 13-May 85. 68.9 74. 53.8 41. 5. 74.6 71.1 47.5 2-May 86. 71.3 76.1 57.2 45. 112.7 79.3 8.5 58.4 27-May 86. 71.2 77.9 59.7 47. 116.9 78.2 87.1 63.5 3-Jun 89. 72.5 79.4 61.4 5. 121.1 81.6 93. 67.9 -Jun 9. 71.6 81.6 62.7 53. 13.2 81.3 97.6 7.6 17-Jun 91. 74.6 83.9 64.7 53. 129.5 84.6 1.8 76.7 24-Jun 94. 76. 85. 67. 55. 133.7 84.5 7.8 81.1 1-Jul 94. 77.6 85.9 67.1 57. 133.7 88.2 6.7 8.4 8-Jul 95. 76. 87.1 68.5 59. 138.6 87.9 113.2 86.2 15-Jul 96. 78.7 87.5 7.2 6. 142.8 88.5 119.4 92.5 22-Jul 96. 78.2 88.4 7.2 63. 137.9 86.6 118.6 91.2 29-Jul 94. 76.3 87.1 69.5 64. 137.9 84.5 115.9 89.8 5-Aug 94. 76.3 86.3 68.5 61. 138.6 85. 112.4 87.1 12-Aug 94. 78.5 85.9 68.1 59. 142.8 86.1 114.5 89.2 19-Aug 94. 79.1 86.2 68.2 59. 143.5 86.1 111.8 87.8 26-Aug 94. 77.1 86. 67.5 6. 137.9 85.1 1.8 85.8 2-Sep 93. 76.6 85.1 67.3 55. 137.2 84.5 112.3 87.2 9-Sep 91. 75.3 83. 64.4 53. 129.5 82.5 2.3 78.3 16-Sep 9. 73.3 8.9 62.3 5. 124.6 82.7 96.9 71.7 23-Sep 88. 74.3 76.3 57.5 45. 12.4 79.7 85.9 61.4 3-Sep 86. 72.8 74.1 54.6 44. 116.2 79.9 77.7 55.6 7-Oct 83. 68.1 71.2 51.1 38. 112.7 75.2 68.8 47.2 14-Oct 82. 67.4 69.9 49.5 37. 5. 73.4 65.2 45.3 21-Oct 8. 66.9 66.9 46.6 35..8 69.1 59.4 38.5 28-Oct 78. 64.7 65.4 45.4 32. 97.3 69.4 57.7 38.1 4-Nov 77. 62.6 64.2 44.8 28. 88.2 67.7 54.9 36.6 11-Nov 73. 6.6 57.1 39.7 25. 91.7 66.3 46.5 28.3 18-Nov 71. 59.1 55.5 38.6 24. 9.3 66.4 43.8 26.9 25-Nov 71. 6.3 54.5 38. 25. 79.1 64. 44.1 27. 2-Dec 7. 62.6 5.8 35.3 2. 84.7 67.8 41. 24.1 9-Dec 66. 59.3 47.9 32.2 11. 71.4 6.5 35.4 2.4 16-Dec 66. 58.1 46.4 31.5 8. 71.4 61.5 34.9 21. 23-Dec 62. 57.6 42.1 26.9 1. 71.4 59.3 32. 17.6 31-Dec 65. 59.4 42.7 28.4. 72.8 62.5 33.7 19.4
Degree Days, Heating and Cooling (Base 65 o F) 5 Degree Days ( o F) -5 - -15-2 -25-3 J F M A M J J A S O N D Mean Cooling Degree Days Mean Heating Degree Days Mean Cooling Mean Heating Degree Days ( o F) Degree Days ( o F) JAN FEB 1 797 MAR 16 573 APR 53 32 MAY 139 111 JUN 297 19 JUL 413 3 AUG 365 7 SEP 193 69 OCT 49 284 NOV 9 542 DEC 1 858 ANN 1537 4575
Average Ventilation and Infiltration Loads (Outside Air vs. 75 o F, 6% RH summer; 68 o F, 3% RH winter) 4 3 2 Load (Btu/cfm) - -2-3 -4-5 -6-7 -8 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 Average Sensible Average Latent Average Latent Cooling Load Heating Load Cooling Load Heating Load (Btu/cfm) (Btu/cfm) (Btu/cfm) (Btu/cfm) JAN -28587 1-5872 FEB -22833 1-4721 MAR 34-1776 23-2868 APR 232-965 136-28 MAY 746-45 1972-82 JUN 244-96 6396 JUL 3951-219 11754-1 AUG 3172-412 43 SEP 1261-2672 4624-9 OCT 146-9245 64-465 NOV 8-1625 2-2193 DEC -24623 2-4461 ANN 11954-136578 3654-217
Average Annual Solar Radiation Nearest Available Site (Source: National Renewable Energy Laboratory, Golden CO, 1995) City: LOUISVILLE State: KY WBAN No: 93821 Lat(N): 38.18 Long(W): 85.73 Elev(ft): 489 Stn Type: Secondary SHADING GEOMETRY IN DIMENSIONLESS UNITS Window: 1 Overhang:.482 Vert Gap:.311 AVERAGE INCIDENT SOLAR RADIATION (Btu/sq.ft./day), Percentage Uncertainty = 9 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year HORIZ Global 64 9 12 157 184 2 194 177 144 9 7 55 13 Std Dev 49 72 5 138 133 125 1 95 87 76 68 52 41 Minimum 55 79 98 133 16 18 16 16 127 9 57 46 123 Maximum 73 8 139 182 215 246 212 194 16 128 84 67 144 Diffuse 36 46 6 72 83 88 87 78 63 46 37 32 6 Clear Day Global 97 13 178 224 252 262 253 228 187 14 85 178 NORTH Global 2 28 36 44 55 63 59 49 39 3 22 19 39 Diffuse 2 28 36 43 5 54 52 47 39 3 22 19 37 Clear Day Global 19 25 33 43 57 68 63 48 37 28 2 17 38 EAST Global 4 56 7 9 3 9 7 85 68 44 36 76 Diffuse 26 33 43 53 6 64 63 58 48 37 27 22 45 Clear Day Global 72 9 115 134 142 144 14 132 115 93 7 63 9 SOUTH Global 9 3 94 82 76 79 93 7 118 93 82 93 Diffuse 36 43 5 54 57 58 58 58 54 46 37 32 48 Clear Day Global 193 195 176 136 2 87 93 119 155 18 185 184 15 WEST Global 42 56 72 89 9 6 86 68 45 36 76 Diffuse 26 34 44 53 6 66 64 59 49 38 27 22 45 Clear Day Global 72 9 115 134 142 144 14 132 115 93 7 63 9
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 Oct Nov Dec Year HORIZ Unshaded 43 62 85 113 133 145 14 128 3 76 47 36 93 NORTH Unshaded 15 19 25 3 36 4 39 33 27 2 16 13 26 Shaded 13 17 22 27 33 37 35 3 25 19 14 1 24 EAST Unshaded 28 39 5 64 74 77 76 72 6 48 3 24 54 Shaded 26 35 45 56 64 67 66 63 53 43 27 22 47 SOUTH Unshaded 68 75 7 6 5 46 48 59 72 84 69 62 64 Shaded 66 7 56 42 35 36 36 4 54 75 66 6 53 WEST Unshaded 29 39 5 63 7 78 75 7 6 48 3 25 54 Shaded 26 35 45 56 62 67 65 63 54 43 28 22 47 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 3pm 5pm HORIZ. M.Clear 26 64 82 73 41 32 74 98 99 78 M.Cloudy 15 38 5 46 25 22 49 72 76 58 NORTH M.Clear 8 13 15 14 21 16 17 17 17 M.Cloudy 6 14 17 16 13 16 19 19 17 EAST M.Clear 65 67 25 14 63 79 48 17 17 M.Cloudy 2 31 2 16 31 45 37 19 17 SOUTH M.Clear 25 62 8 72 4 22 42 43 27 M.Cloudy 3 41 37 19 9 19 33 36 23 WEST M.Clear 8 13 15 54 73 16 17 37 73 M.Cloudy 6 14 17 31 3 9 16 19 32 49 M.Clear (% hrs) 25 25 25 23 22 36 39 31 28 31 Sept Dec 9am 11am 1pm 3pm 5pm 9am 11am 1pm 3pm 5pm HORIZ. M.Clear 14 56 83 84 59 6 35 49 38 M.Cloudy 9 33 55 58 4 4 2 27 22 6 NORTH M.Clear 6 13 16 16 14 3 9 11 9 4 M.Cloudy 4 13 18 18 14 2 8 11 9 3 EAST M.Clear 41 75 45 16 14 22 46 14 9 4 M.Cloudy 14 32 31 18 14 5 17 12 9 3 SOUTH M.Clear 9 45 7 71 48 16 69 88 74 25 M.Cloudy 5 22 42 45 29 4 22 29 25 7 WEST M.Clear 6 13 16 38 7 3 9 11 44 31 M.Cloudy 4 13 18 29 39 2 8 11 18 8 M.Clear (% hrs) 39 45 37 34 4 23 23 25 23 23
Wind Summary - December, January, and February Labels of Percent Frequency on North Axis NNW NW N 12 8 NNE NE WNW 6 4 ENE 2 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 = 4.61 Wind Summary - March, April, and May Labels of Percent Frequency on North Axis WNW W NW NNW N 14 12 8 6 4 2 NNE NE ENE E WSW ESE SW SE SSW S SSE >34 knots 25-34 knots 15-24 knots 6-14 knots 1-5 knots Percent Calm = 5.67
Wind Summary - June, July, and August Labels of Percent Frequency on North Axis NW NNW N 15 NNE NE WNW 5 ENE W E WSW ESE SW SSW S SSE SE >34 knots 25-34 knots 15-24 knots 6-14 knots 1-5 knots Percent Calm = 8.33 Wind Summary - September, October, and November Labels of Percent Frequency on North Axis N 15 NNW NNE NW NE WNW 5 ENE W E WSW ESE SW SSW S SSE SE >34 knots 25-34 knots 15-24 knots 6-14 knots 1-5 knots Percent Calm = 8.1