S
M
T
W
T
F
S
26
89°
63°
27
97°
59°
28
89°
57°
29
89°
59°
30
91°
61°
31
96°
59°
1
90°
63°
2
92°
61°
3
91°
60°
4
93°
60°
5
89°
59°
6
92°
60°
7
94°
60°
8
94°
61°
9
92°
63°
10
95°
62°
11
94°
65°
12
95°
64°
13
95°
64°
14
94°
60°
15
95°
59°
16
93°
62°
17
92°
62°
18
89°
61°
19
92°
62°
20
91°
60°
21
90°
61°
22
93°
61°
23
95°
60°
24
94°
60°
25
94°
58°
26
92°
57°
27
91°
56°
28
90°
57°
29
93°
59°
30
95°
60°
31
95°
60°
1
94°
59°
2
94°
59°
3
93°
55°
4
92°
55°
5
91°
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 89° to 97°, with overnight lows between 54° and 65°. The average high for August is 93° with an average low of 60°. 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.
