|
MAINE
/ Portland
Latitude (N): 43.65
Longitude
(W): 70.32
Elevation (feet): 62
Annual Precipitation (inches): 44
Annual heating degree days (base 65 deg. F): 7,500
APPROXIMATE
SUN ANGLE (at noon facing due south)
|
Mar
21
|
June
21
|
Sept
21
|
Dec
21
|
|
46 deg.
|
70 deg.
|
46 deg.
|
22 deg.
|
AVERAGE DAILY SOLAR RADIATION
| |
March
|
June
|
September
|
December
|
| On
horizontal surface |
|
kWh/m2
|
3.8 |
6.1 |
4.2 |
1.5 |
|
BTU/ft2
|
1,205 |
1,935 |
1,332 |
476 |
| On
vertical surface |
|
kWh/m2
|
4.1 |
2.7 |
3.6 |
3.1 |
|
BTU/ft2
|
1,301 |
856 |
1,142 |
983 |
AVERAGE TEMPERATURE
AND WIND SPEED
| |
March
|
June
|
September
|
December
|
| Daily
Min. - Degrees F |
24 |
52 |
49 |
18 |
| Daily
Max. - Degrees F |
41 |
73 |
69 |
35 |
| Wind
Speed - miles/hour |
9.8 |
8.5 |
7.8 |
8.7 |
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