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August 20, 2008


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Average Monthly ETo (PET)
(inches/month)
City
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Total
Abilene
2.08
2.57
4.14
5.48
6.47
7.65
8.36
7.46
5.48
4.21
2.67
2.08
58.65
Amarillo
1.84
2.27
3.73
5.06
5.89
7.51
8.08
7.29
5.61
4.05
2.4
1.78
58.65
Austin
2.27
2.72
4.34
5.27
6.39
7.15
7.22
7.25
5.57
4.38
2.74
2.21
57.51
Brownsville
2.65
3.03
4.48
5.17
6.03
6.32
6.68
6.65
5.21
4.34
3.01
2.59
56.16
College Station
2.2
2.71
4.22
5.2
6.25
6.89
7.1
6.85
5.6
4.3
2.8
2.2
56.32
Corpus Christi
2.42
2.95
4.28
5.17
5.95
6.43
6.68
6.65
5.21
4.34
3.01
2.59
55.68
Dallas/Ft. Worth
2.0
2.46
3.96
5.14
6.21
7.06
7.40
7.25
5.49
4.19
2.59
2.10
55.85
Del Rio
2.47
3.01
4.76
6.01
6.98
7.41
7.57
7.41
5.77
4.35
2.91
2.36
61.01
El Paso
2.74
3.53
6.07
8.19
9.83
11.12
9.19
8.94
7.69
5.89
3.58
2.49
79.26
Galveston
2.2
2.6
4.1
5.0
6.11
6.6
6.2
6.0
5.5
4.2
2.8
2.3
53.61
Houston
2.36
2.83
4.32
5.01
6.11
6.57
6.52
6.08
5.57
4.28
2.9
2.35
54.9
Lubbock
2.35
2.63
4.41
5.53
6.93
7.73
7.63
7.2
5.54
4.19
2.61
2.33
59.08
Midland
2.2
2.78
4.46
5.91
7.21
8.2
9.23
8.62
6.95
4.31
2.78
2.16
64.81
Port Arthur
2.25
2.63
3.95
5.09
6.12
6.6
5.81
5.61
5.46
4.18
2.76
2.23
52.69
San Angelo
2.88
3.13
5.31
7.01
8.48
9.16
9.29
8.49
6.60
5.08
3.37
2.54
71.34
San Antonio
2.42
2.9
4.42
5.47
6.47
6.97
7.31
6.99
5.64
4.44
2.85
2.36
59.93
Uvalde
2.44
2.95
4.62
5.85
6.7
7.21
7.5
7.31
5.7
4.4
2.89
2.36
59.93
Victoria
2.35
2.87
4.29
5.77
6.39
6.7
6.92
6.7
5.36
4.41
2.93
2.33
57.02
Waco
2.13
2.62
4.03
5.31
6.45
7.15
7.40
7.5
5.7
4..41
2.7
2.17
54.05
Weslaco
2.5
2.57
3.96
4.9
6.12
6.53
7.0
6.58
4.79
3.96
2.85
2.29
54.05
Wichita Falls
1.94
2.46
4.07
5.50
6.7
7.54
7.97
7.72
5.79
4.3
2.62
1.95
58.56
Averages were computed using climatic data over the entire period of record available from the National Weather Service and compared to ETo rates based on the standardized Penman-Monteith equation where available. (August 2005)

City
Years of Data
Abilene
52
Amarillo
52
Austin
70
Brownsville
79
College Station
47
Corpus Christi
52
Dallas/Ft. Worth
26
Del Rio
44
El Paso
52
Galveston
59
Houston
31
Lubbock
89
Midland
52
Port Arthur
53
San Angelo
54
San Antonio
54
Victoria
39
Waco
68
Wichita Falls
99
 


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The TexasET Network is partially supported through a federal program, the “Rio Grande Basin Initiative,” and administered by the
Texas Water Resources Institute of the Texas A&M University System, Cooperative State Research, Education and Extension Service, U.S.
Department of Agriculture under Agreement No. 2005-34461-15661 and Agreement No. 2005-45049-03209.