S
M
T
W
T
F
S
26
68°
54°
27
69°
55°
28
68°
57°
29
72°
57°
30
74°
58°
31
74°
59°
1
73°
57°
2
70°
57°
3
69°
56°
4
70°
55°
5
69°
55°
6
70°
56°
7
69°
54°
8
68°
54°
9
69°
55°
10
69°
55°
11
70°
54°
12
73°
54°
13
74°
55°
14
72°
58°
15
74°
59°
16
74°
59°
17
74°
58°
18
76°
59°
19
75°
58°
20
75°
59°
21
74°
59°
22
75°
57°
23
73°
60°
24
76°
59°
25
76°
59°
26
75°
58°
27
76°
59°
28
76°
59°
29
73°
55°
30
71°
56°
31
71°
59°
1
73°
60°
2
76°
60°
3
76°
58°
4
71°
59°
5
71°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in South San Francisco
South San Francisco's August 2026 forecast shows daily high temperatures ranging from 68° to 76°, with overnight lows between 54° and 60°. The average high for August is 72° 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 South San Francisco. See also: September | October | November.
