|
PENNSYLVANIA
/ Philadelphia
Latitude (N): 39.88
Longitude
(W): 75.25
Elevation (feet): 30
Annual Precipitation (inches): 41
Annual heating degree days (base 65 deg. F): 4,950
APPROXIMATE
SUN ANGLE (at noon facing due south)
|
Mar
21
|
June
21
|
Sept
21
|
Dec
21
|
|
50 deg.
|
74 deg.
|
50 deg.
|
26 deg.
|
AVERAGE DAILY SOLAR RADIATION
| |
March
|
June
|
September
|
December
|
| On
horizontal surface |
|
kWh/m2
|
3.8 |
6.1 |
4.4 |
1.7 |
|
BTU/ft2
|
1,205 |
1,935 |
1,396 |
380 |
| On
vertical surface |
|
kWh/m2
|
3.4 |
2.5 |
3.4 |
2.9 |
|
BTU/ft2
|
1,078 |
793 |
1,078 |
920 |
AVERAGE TEMPERATURE
AND WIND SPEED
| |
March
|
June
|
September
|
December
|
| Daily
Min. - Degrees F |
34 |
62 |
59 |
28 |
| Daily
Max. - Degrees F |
52 |
82 |
78 |
43 |
| Wind
Speed - miles/hour |
11.2 |
8.7 |
8.5 |
10.1 |
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