|
TEXAS
/ Austin
Latitude (N): 30.30
Longitude
(W): 97.70
Elevation (feet): 620
Annual Precipitation (inches): 32
Annual heating degree days (base 65 deg. F): 1,760
APPROXIMATE
SUN ANGLE (at noon facing due south)
|
Mar
21
|
June
21
|
Sept
21
|
Dec
21
|
|
60 deg.
|
84 deg.
|
60 deg.
|
36 deg.
|
AVERAGE DAILY SOLAR RADIATION
| |
March
|
June
|
September
|
December
|
| On
horizontal surface |
|
kWh/m2
|
4.7 |
6.6 |
5.2 |
2.8 |
|
BTU/ft2
|
1,491 |
2,094 |
1,649 |
888 |
| On
vertical surface |
|
kWh/m2
|
3.4 |
1.9 |
3.3 |
3.8 |
|
BTU/ft2
|
1,078 |
603 |
1,047 |
1,205 |
AVERAGE TEMPERATURE
AND WIND SPEED
| |
March
|
June
|
September
|
December
|
| Daily
Min. - Degrees F |
51 |
71 |
70 |
41 |
| Daily
Max. - Degrees F |
72 |
91 |
91 |
62 |
| Wind
Speed - miles/hour |
10.5 |
8.5 |
7.8 |
9.2 |
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