|
ALABAMA
/ Huntsville
Latitude (N): 34.65
Longitude
(W): 86.77
Elevation (feet): 623
Annual Precipitation (inches): 55
Annual heating degree days (base 65 deg. F): 3,280
APPROXIMATE
SUN ANGLE (at noon facing due south)
|
Mar
21
|
June
21
|
Sept
21
|
Dec
21
|
|
55 deg.
|
80 deg.
|
55 deg.
|
32 deg.
|
AVERAGE DAILY SOLAR RADIATION
| |
March
|
June
|
September
|
December
|
| On
horizontal surface |
|
kWh/m2
|
4.1 |
6.3 |
4.7 |
2.1 |
|
BTU/ft2
|
1,301 |
1,998 |
1,491 |
666 |
| On
vertical surface |
|
kWh/m2
|
3.3 |
2.1 |
3.2 |
3.1 |
|
BTU/ft2
|
1,047 |
666 |
1,015 |
983 |
AVERAGE TEMPERATURE
AND WIND SPEED
| |
March
|
June
|
September
|
December
|
| Daily
Min. - Degrees F |
41 |
65 |
62 |
33 |
| Daily
Max. - Degrees F |
63 |
87 |
83 |
53 |
| Wind
Speed - miles/hour |
10.1 |
6.7 |
6.9 |
9.4 |
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