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> WEATHER DATA

TENNESSEE / Knoxville
Latitude (N): 35.82
Longitude (W): 83.98
Elevation (feet):
981
Annual Precipitation (inches):
47
Annual heating degree days (base 65 deg. F): 3,660

APPROXIMATE SUN ANGLE (at noon facing due south)

Mar 21
June 21
Sept 21
Dec 21
54 deg.
78 deg.
54 deg.
30 deg.



AVERAGE DAILY SOLAR RADIATION

 
March
June
September
December
On horizontal surface
kWh/m2
4.0 6.2 4.5 2.0
BTU/ft2
1,269 1,967 1,427 634
On vertical surface
kWh/m2
3.2 2.2 3.2 3.0
BTU/ft2
1,015 698 1,015 952


AVERAGE TEMPERATURE AND WIND SPEED

 
March
June
September
December
Daily Min. - Degrees F 37 62 59 30
Daily Max. - Degrees F 61 84 81 50
Wind Speed - miles/hour 8.3 6.3 5.6 7.2

 

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