S
M
T
W
T
F
S
26
97°
63°
27
99°
66°
28
101°
68°
29
101°
69°
30
98°
67°
31
98°
68°
1
100°
69°
2
99°
69°
3
100°
68°
4
99°
68°
5
97°
67°
6
97°
67°
7
98°
69°
8
99°
68°
9
97°
66°
10
97°
67°
11
98°
64°
12
96°
62°
13
99°
63°
14
98°
61°
15
93°
66°
16
95°
69°
17
101°
68°
18
102°
65°
19
101°
67°
20
99°
65°
21
100°
65°
22
100°
64°
23
99°
66°
24
100°
61°
25
93°
62°
26
96°
62°
27
97°
61°
28
95°
60°
29
94°
59°
30
91°
59°
31
91°
58°
1
93°
59°
2
92°
57°
3
91°
55°
4
90°
54°
5
89°
54°
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 89° to 102°, with overnight lows between 54° and 69°. The average high for August is 97° with an average low of 64°. 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.