S
M
T
W
T
F
S
26
69°
57°
27
68°
57°
28
66°
56°
29
68°
57°
30
69°
58°
31
69°
58°
1
67°
57°
2
68°
58°
3
68°
57°
4
66°
56°
5
65°
56°
6
64°
55°
7
64°
56°
8
66°
56°
9
66°
55°
10
67°
54°
11
64°
53°
12
63°
54°
13
64°
54°
14
64°
54°
15
65°
54°
16
64°
54°
17
65°
53°
18
67°
54°
19
68°
52°
20
67°
53°
21
67°
53°
22
68°
57°
23
66°
57°
24
67°
54°
25
67°
55°
26
68°
54°
27
67°
54°
28
67°
55°
29
66°
53°
30
68°
53°
31
72°
54°
1
72°
56°
2
68°
52°
3
66°
52°
4
67°
53°
5
68°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in San Francisco
San Francisco's August 2026 forecast shows daily high temperatures ranging from 63° to 72°, with overnight lows between 52° and 58°. The average high for August is 67° with an average low of 55°. 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 San Francisco. See also: September | October | November.
