S
M
T
W
T
F
S
29
59°
46°
30
58°
47°
1
62°
40°
2
59°
43°
3
56°
47°
4
56°
49°
5
60°
47°
6
61°
48°
7
60°
47°
8
59°
46°
9
57°
45°
10
59°
41°
11
58°
40°
12
59°
46°
13
Hist. Avg.
57°
42°
14
Hist. Avg.
57°
42°
15
Hist. Avg.
57°
42°
16
Hist. Avg.
57°
42°
17
Hist. Avg.
57°
42°
18
Hist. Avg.
56°
42°
19
Hist. Avg.
56°
42°
20
Hist. Avg.
56°
42°
21
Hist. Avg.
56°
42°
22
Hist. Avg.
56°
42°
23
Hist. Avg.
56°
42°
24
Hist. Avg.
56°
42°
25
Hist. Avg.
56°
42°
26
Hist. Avg.
56°
42°
27
Hist. Avg.
56°
42°
28
Hist. Avg.
56°
42°
29
Hist. Avg.
56°
42°
30
Hist. Avg.
56°
42°
31
Hist. Avg.
56°
42°
1
Hist. Avg.
56°
42°
2
Hist. Avg.
56°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in San Rafael
San Rafael's December 2026 forecast shows daily high temperatures ranging from 56° to 62°, with overnight lows between 40° and 49°. The average high for December is 59° with an average low of 45°. 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 Rafael. See also: January | February | March.
