|
VIRGINIA
/ Richmond
Latitude (N): 37.50
Longitude
(W): 77.33
Elevation (feet): 164
Annual Precipitation (inches): 43
Annual heating degree days (base 65 deg. F): 3,960
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
|
4.1 |
6.3 |
4.5 |
2.0 |
|
BTU/ft2
|
1,301 |
1,998 |
1,427 |
634 |
| On
vertical surface |
|
kWh/m2
|
3.5 |
2.4 |
3.3 |
3.3 |
|
BTU/ft2
|
1,110 |
761 |
1,047 |
1,047 |
AVERAGE TEMPERATURE
AND WIND SPEED
| |
March
|
June
|
September
|
December
|
| Daily
Min. - Degrees F |
36 |
63 |
59 |
30 |
| Daily
Max. - Degrees F |
60 |
85 |
81 |
50 |
| Wind
Speed - miles/hour |
9.4 |
7.6 |
6.7 |
8.1 |
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