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