|
MICHIGAN
/ Alpena
Latitude (N): 45.07
Longitude
(W): 83.57
Elevation (feet): 689
Annual Precipitation (inches): 29
Annual heating degree days (base 65 deg. F): 8,410
APPROXIMATE
SUN ANGLE (at noon facing due south)
|
Mar
21
|
June
21
|
Sept
21
|
Dec
21
|
|
45 deg.
|
69 deg.
|
45 deg.
|
21 deg.
|
AVERAGE DAILY SOLAR RADIATION
| |
March
|
June
|
September
|
December
|
| On
horizontal surface |
|
kWh/m2
|
3.7 |
6.2 |
3.8 |
1.2 |
|
BTU/ft2
|
1,174 |
1,967 |
1,205 |
380 |
| On
vertical surface |
|
kWh/m2
|
4.2 |
2.8 |
3.2 |
2.1 |
|
BTU/ft2
|
1,332 |
888 |
1,015 |
666 |
AVERAGE TEMPERATURE
AND WIND SPEED
| |
March
|
June
|
September
|
December
|
| Daily
Min. - Degrees F |
18 |
48 |
46 |
17 |
| Daily
Max. - Degrees F |
38 |
74 |
68 |
31 |
| Wind
Speed - miles/hour |
9.4 |
7.8 |
7.4 |
8.7 |
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