S
M
T
W
T
F
S
26
63°
53°
27
64°
54°
28
63°
56°
29
67°
56°
30
69°
57°
31
69°
58°
1
68°
56°
2
65°
56°
3
64°
55°
4
66°
54°
5
64°
54°
6
65°
55°
7
64°
53°
8
64°
53°
9
65°
54°
10
64°
54°
11
64°
53°
12
69°
54°
13
69°
56°
14
68°
57°
15
70°
58°
16
70°
58°
17
69°
56°
18
71°
58°
19
70°
57°
20
71°
58°
21
71°
58°
22
70°
56°
23
69°
59°
24
71°
58°
25
72°
58°
26
71°
57°
27
72°
59°
28
72°
58°
29
69°
54°
30
67°
55°
31
67°
59°
1
69°
60°
2
72°
60°
3
72°
57°
4
67°
58°
5
67°
56°
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 53° and 60°. The average high for August is 68° with an average low of 56°. 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.
