S
M
T
W
T
F
S
26
88°
72°
27
90°
72°
28
90°
73°
29
89°
73°
30
91°
72°
31
90°
73°
1
91°
73°
2
92°
74°
3
92°
74°
4
93°
73°
5
93°
74°
6
92°
74°
7
93°
73°
8
92°
73°
9
91°
72°
10
90°
71°
11
91°
73°
12
91°
73°
13
90°
72°
14
92°
73°
15
91°
73°
16
90°
70°
17
92°
69°
18
91°
70°
19
91°
67°
20
87°
66°
21
91°
67°
22
90°
69°
23
89°
67°
24
85°
64°
25
85°
64°
26
84°
65°
27
84°
63°
28
85°
63°
29
84°
64°
30
84°
64°
31
87°
65°
1
88°
64°
2
89°
66°
3
89°
67°
4
88°
65°
5
87°
67°
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 84° to 93°, with overnight lows between 63° and 74°. The average high for August is 89° with an average low of 69°. 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.