|
WASHINGTON
/ Seattle
Latitude (N): 47.45
Longitude
(W): 122.30
Elevation (feet): 400
Annual Precipitation (inches): 38
Annual heating degree days (base 65 deg. F): 4,680
APPROXIMATE
SUN ANGLE (at noon facing due south)
|
Mar
21
|
June
21
|
Sept
21
|
Dec
21
|
|
43 deg.
|
67 deg.
|
43 deg.
|
19 deg.
|
AVERAGE DAILY SOLAR RADIATION
| |
March
|
June
|
September
|
December
|
| On
horizontal surface |
|
kWh/m2
|
2.8 |
5.8 |
3.8 |
0.8 |
|
BTU/ft2
|
888 |
1,840 |
1,205 |
254 |
| On
vertical surface |
|
kWh/m2
|
2.8 |
2.8 |
3.4 |
1.3 |
|
BTU/ft2
|
888 |
888 |
1,078 |
412 |
AVERAGE TEMPERATURE
AND WIND SPEED
| |
March
|
June
|
September
|
December
|
| Daily
Min. - Degrees F |
38 |
52 |
52 |
36 |
| Daily
Max. - Degrees F |
53 |
70 |
69 |
45 |
| Wind
Speed - miles/hour |
8.9 |
8.3 |
7.6 |
8.9 |
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