S
M
T
W
T
F
S
28
81°
69°
29
80°
70°
30
84°
70°
31
80°
66°
1
79°
60°
2
80°
63°
3
82°
66°
4
83°
67°
5
83°
65°
6
83°
67°
7
82°
66°
8
85°
69°
9
86°
74°
10
85°
74°
11
84°
71°
12
84°
67°
13
81°
68°
14
84°
66°
15
81°
66°
16
78°
61°
17
82°
65°
18
79°
68°
19
78°
65°
20
80°
62°
21
81°
64°
22
82°
68°
23
84°
68°
24
85°
72°
25
85°
71°
26
85°
70°
27
78°
68°
28
79°
64°
29
79°
61°
30
81°
63°
31
78°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in San Francisco
San Francisco's January 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for January is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how January weather will actually feel in San Francisco. See also: February | March | April.
