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> WEATHER DATA

MONTANA / Billings
Latitude (N): 45.80
Longitude (W): 108.53
Elevation (feet):
3,570
Annual Precipitation (inches):
15
Annual heating degree days (base 65 deg. F): 7,212

APPROXIMATE SUN ANGLE (at noon facing due south)

Mar 21
June 21
Sept 21
Dec 21
44 deg.
68 deg.
44 deg.
20 deg.



AVERAGE DAILY SOLAR RADIATION

 
March
June
September
December
On horizontal surface
kWh/m2
3.8 6.7 4.5 1.4
BTU/ft2
1,205 2,125 1,427 444
On vertical surface
kWh/m2
4.2 3.0 4.2 3.3
BTU/ft2
1,332 952 1,332 1,047


AVERAGE TEMPERATURE AND WIND SPEED

 
March
June
September
December
Daily Min. - Degrees F 25 52 46 17
Daily Max. - Degrees F 46 78 72 34
Wind Speed - miles/hour 11.2 9.6 9.8 13.2

 

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