|
TEXAS
/ Brownsville
Latitude (N): 25.90
Longitude
(W): 97.43
Elevation (feet): 20
Annual Precipitation (inches): 25
Annual heating degree days (base 65 deg. F): 610
APPROXIMATE
SUN ANGLE (at noon facing due south)
|
Mar
21
|
June
21
|
Sept
21
|
Dec
21
|
|
64 deg.
|
88 deg.
|
64 deg.
|
40 deg.
|
AVERAGE DAILY SOLAR RADIATION
| |
March
|
June
|
September
|
December
|
| On
horizontal surface |
|
kWh/m2
|
4.6 |
6.4 |
5.2 |
2.7 |
|
BTU/ft2
|
1,459 |
2,030 |
1,649 |
856 |
| On
vertical surface |
|
kWh/m2
|
3.0 |
1.6 |
2.9 |
3.1 |
|
BTU/ft2
|
952 |
508 |
920 |
983 |
AVERAGE TEMPERATURE
AND WIND SPEED
| |
March
|
June
|
September
|
December
|
| Daily
Min. - Degrees F |
59 |
75 |
73 |
52 |
| Daily
Max. - Degrees F |
78 |
91 |
90 |
72 |
| Wind
Speed - miles/hour |
13.2 |
11.4 |
9.4 |
10.7 |
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