S
M
T
W
T
F
S
29
56°
45°
30
56°
53°
1
57°
45°
2
56°
48°
3
55°
49°
4
59°
50°
5
59°
44°
6
55°
48°
7
55°
44°
8
54°
50°
9
53°
50°
10
55°
48°
11
60°
51°
12
61°
48°
13
56°
46°
14
59°
47°
15
60°
48°
16
60°
49°
17
59°
50°
18
61°
51°
19
61°
52°
20
60°
45°
21
55°
47°
22
54°
46°
23
56°
48°
24
55°
45°
25
54°
45°
26
56°
48°
27
53°
49°
28
Hist. Avg.
57°
46°
29
Hist. Avg.
57°
46°
30
Hist. Avg.
57°
46°
31
Hist. Avg.
57°
46°
1
Hist. Avg.
57°
46°
2
Hist. Avg.
57°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in San Francisco
San Francisco's December 2026 forecast shows daily high temperatures ranging from 53° to 61°, with overnight lows between 44° and 53°. The average high for December is 57° with an average low of 48°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in San Francisco. See also: January | February | March.
