S
M
T
W
T
F
S
29
64°
32°
30
61°
31°
1
61°
26°
2
59°
28°
3
62°
24°
4
57°
31°
5
61°
31°
6
63°
32°
7
62°
32°
8
63°
31°
9
62°
31°
10
59°
26°
11
58°
27°
12
Hist. Avg.
54°
26°
13
Hist. Avg.
53°
26°
14
Hist. Avg.
53°
26°
15
Hist. Avg.
53°
25°
16
Hist. Avg.
53°
25°
17
Hist. Avg.
53°
25°
18
Hist. Avg.
53°
25°
19
Hist. Avg.
52°
25°
20
Hist. Avg.
52°
25°
21
Hist. Avg.
52°
24°
22
Hist. Avg.
52°
24°
23
Hist. Avg.
52°
24°
24
Hist. Avg.
52°
24°
25
Hist. Avg.
52°
24°
26
Hist. Avg.
52°
24°
27
Hist. Avg.
52°
24°
28
Hist. Avg.
52°
24°
29
Hist. Avg.
52°
24°
30
Hist. Avg.
52°
24°
31
Hist. Avg.
52°
24°
1
Hist. Avg.
52°
24°
2
Hist. Avg.
52°
24°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Santa Rosa
Santa Rosa's December 2026 forecast shows daily high temperatures ranging from 57° to 64°, with overnight lows between 24° and 32°. The average high for December is 61° with an average low of 29°. 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 Santa Rosa. See also: January | February | March.
