S
M
T
W
T
F
S
26
68°
60°
27
67°
58°
28
70°
58°
29
64°
58°
30
69°
58°
31
76°
57°
1
80°
58°
2
83°
56°
3
81°
55°
4
76°
57°
5
71°
57°
6
72°
58°
7
74°
57°
8
73°
59°
9
71°
57°
10
71°
57°
11
72°
59°
12
73°
58°
13
72°
59°
14
71°
60°
15
69°
58°
16
69°
59°
17
74°
60°
18
75°
59°
19
75°
61°
20
77°
62°
21
77°
62°
22
76°
61°
23
76°
61°
24
75°
60°
25
76°
61°
26
75°
60°
27
76°
61°
28
74°
60°
29
71°
59°
30
75°
61°
31
76°
61°
1
75°
60°
2
74°
60°
3
71°
59°
4
72°
61°
5
76°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Alameda
Alameda's August 2026 forecast shows daily high temperatures ranging from 69° to 83°, with overnight lows between 55° and 62°. The average high for August is 74° with an average low of 59°. 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 Alameda. See also: September | October | November.