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> WEATHER DATA

IOWA / Waterloo
Latitude (N): 42.55
Longitude (W): 92.40
Elevation (feet): 869
Annual Precipitation (inches): 33
Annual heating degree days (base 65 deg. F): 7,540

APPROXIMATE SUN ANGLE (at noon facing due south)

Mar 21
June 21
Sept 21
Dec 21
47 deg.
71 deg.
47 deg.
23 deg.



AVERAGE DAILY SOLAR RADIATION

 
March
June
September
December
On horizontal surface
kWh/m2
3.6 6.4 4.3 1.5
BTU/ft2
1,142 2,030 1,364 476
On vertical surface
kWh/m2
3.6 2.7 3.5 2.9
BTU/ft2
1,142 856 1,110 920


AVERAGE TEMPERATURE AND WIND SPEED

 
March
June
September
December
Daily Min. - Degrees F 25 57 50 12
Daily Max. - Degrees F 43 80 74 29
Wind Speed - miles/hour 12.5 9.8 9.2 11.4

 

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