S
M
T
W
T
F
S
26
65°
57°
27
65°
56°
28
71°
57°
29
67°
57°
30
67°
56°
31
72°
55°
1
74°
56°
2
75°
56°
3
72°
57°
4
68°
59°
5
68°
58°
6
73°
56°
7
69°
55°
8
70°
58°
9
67°
56°
10
66°
58°
11
67°
56°
12
65°
56°
13
68°
56°
14
67°
56°
15
66°
56°
16
68°
56°
17
65°
56°
18
66°
57°
19
65°
55°
20
65°
55°
21
70°
57°
22
69°
56°
23
67°
58°
24
70°
58°
25
71°
57°
26
71°
59°
27
70°
59°
28
71°
58°
29
70°
59°
30
69°
58°
31
70°
58°
1
69°
56°
2
70°
57°
3
72°
57°
4
67°
58°
5
68°
58°
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 65° to 73°, with overnight lows between 55° and 59°. The average high for August is 69° with an average low of 57°. 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.
