S
M
T
W
T
F
S
26
71°
59°
27
73°
59°
28
73°
58°
29
74°
59°
30
75°
60°
31
74°
59°
1
68°
55°
2
68°
56°
3
73°
57°
4
69°
56°
5
68°
56°
6
71°
59°
7
74°
58°
8
68°
58°
9
72°
58°
10
73°
59°
11
75°
59°
12
74°
57°
13
74°
56°
14
73°
57°
15
75°
57°
16
75°
59°
17
74°
60°
18
76°
60°
19
76°
59°
20
75°
58°
21
74°
55°
22
71°
53°
23
70°
54°
24
70°
57°
25
71°
55°
26
76°
57°
27
76°
59°
28
75°
59°
29
76°
57°
30
75°
58°
31
76°
57°
1
75°
56°
2
75°
56°
3
74°
57°
4
76°
59°
5
77°
60°
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 77°, with overnight lows between 53° and 60°. The average high for August is 73° with an average low of 58°. 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.
