S
M
T
W
T
F
S
29
49°
39°
30
56°
35°
1
57°
32°
2
50°
36°
3
56°
28°
4
55°
27°
5
42°
28°
6
41°
26°
7
41°
27°
8
42°
33°
9
44°
35°
10
54°
31°
11
52°
32°
12
43°
30°
13
42°
30°
14
41°
29°
15
41°
24°
16
40°
21°
17
37°
24°
18
37°
35°
19
44°
34°
20
45°
29°
21
50°
30°
22
42°
38°
23
52°
39°
24
51°
34°
25
50°
33°
26
49°
33°
27
45°
35°
28
48°
36°
29
49°
36°
30
50°
37°
31
51°
34°
1
51°
32°
2
50°
31°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Folsom
Folsom's December 2026 forecast shows daily high temperatures ranging from 37° to 57°, with overnight lows between 21° and 39°. The average high for December is 47° with an average low of 32°. 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 Folsom. See also: January | February | March.
