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> WEATHER DATA

WEST VIRGINIA / Charleston
Latitude (N): 38.37
Longitude (W): 81.60
Elevation (feet):
951
Annual Precipitation (inches):
42
Annual heating degree days (base 65 deg. F): 4,700

APPROXIMATE SUN ANGLE (at noon facing due south)

Mar 21
June 21
Sept 21
Dec 21
52 deg.
76 deg.
52 deg.
28 deg.



AVERAGE DAILY SOLAR RADIATION

 
March
June
September
December
On horizontal surface
kWh/m2
3.7 6.0 4.3 1.7
BTU/ft2
1,174 1,903 1,364 539
On vertical surface
kWh/m2
3.2 2.4 3.2 2.5
BTU/ft2
1,015 761 1,015 793


AVERAGE TEMPERATURE AND WIND SPEED

 
March
June
September
December
Daily Min. - Degrees F 35 60 56 28
Daily Max. - Degrees F 57 83 79 46
Wind Speed - miles/hour 7.6 5.1 4.7 6.7

 

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