S
M
T
W
T
F
S
29
54°
32°
30
53°
28°
1
53°
30°
2
54°
27°
3
53°
27°
4
50°
28°
5
53°
33°
6
58°
43°
7
61°
36°
8
64°
29°
9
59°
28°
10
53°
29°
11
56°
35°
12
56°
37°
13
54°
31°
14
52°
26°
15
49°
26°
16
48°
27°
17
51°
30°
18
53°
37°
19
55°
39°
20
55°
42°
21
62°
41°
22
63°
41°
23
61°
36°
24
64°
35°
25
59°
36°
26
59°
36°
27
60°
26°
28
59°
28°
29
49°
23°
30
49°
20°
31
50°
19°
1
42°
22°
2
46°
21°
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 42° to 64°, with overnight lows between 19° and 43°. The average high for December is 55° with an average low of 31°. 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.
