|
TENNESSEE
/ Knoxville
Latitude (N): 35.82
Longitude
(W): 83.98
Elevation (feet): 981
Annual Precipitation (inches): 47
Annual heating degree days (base 65 deg. F): 3,660
APPROXIMATE
SUN ANGLE (at noon facing due south)
|
Mar
21
|
June
21
|
Sept
21
|
Dec
21
|
|
54 deg.
|
78 deg.
|
54 deg.
|
30 deg.
|
AVERAGE DAILY SOLAR RADIATION
| |
March
|
June
|
September
|
December
|
| On
horizontal surface |
|
kWh/m2
|
4.0 |
6.2 |
4.5 |
2.0 |
|
BTU/ft2
|
1,269 |
1,967 |
1,427 |
634 |
| On
vertical surface |
|
kWh/m2
|
3.2 |
2.2 |
3.2 |
3.0 |
|
BTU/ft2
|
1,015 |
698 |
1,015 |
952 |
AVERAGE TEMPERATURE
AND WIND SPEED
| |
March
|
June
|
September
|
December
|
| Daily
Min. - Degrees F |
37 |
62 |
59 |
30 |
| Daily
Max. - Degrees F |
61 |
84 |
81 |
50 |
| Wind
Speed - miles/hour |
8.3 |
6.3 |
5.6 |
7.2 |
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