S
M
T
W
T
F
S
26
99°
80°
27
101°
78°
28
101°
78°
29
99°
79°
30
100°
80°
31
98°
78°
1
99°
79°
2
99°
80°
3
100°
80°
4
101°
79°
5
100°
79°
6
101°
78°
7
101°
78°
8
100°
79°
9
101°
80°
10
99°
80°
11
100°
79°
12
100°
80°
13
101°
79°
14
100°
79°
15
99°
78°
16
100°
77°
17
100°
78°
18
98°
79°
19
99°
78°
20
101°
79°
21
100°
78°
22
100°
79°
23
99°
79°
24
99°
80°
25
98°
79°
26
99°
79°
27
99°
78°
28
98°
79°
29
99°
79°
30
99°
78°
31
98°
79°
1
98°
79°
2
97°
78°
3
98°
78°
4
97°
77°
5
97°
78°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Alamo
Alamo's August 2026 forecast shows daily high temperatures ranging from 97° to 101°, with overnight lows between 77° and 80°. The average high for August is 99° with an average low of 79°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Alamo. See also: September | October | November.