S
M
T
W
T
F
S
29
38°
29°
30
39°
28°
1
40°
31°
2
39°
26°
3
40°
23°
4
35°
30°
5
36°
33°
6
40°
39°
7
47°
34°
8
51°
30°
9
50°
28°
10
36°
26°
11
37°
25°
12
37°
25°
13
35°
28°
14
36°
25°
15
34°
23°
16
33°
26°
17
33°
26°
18
35°
28°
19
36°
32°
20
39°
33°
21
46°
26°
22
46°
27°
23
37°
34°
24
42°
32°
25
46°
28°
26
40°
27°
27
37°
20°
28
38°
17°
29
31°
18°
30
30°
11°
31
31°
13°
1
23°
15°
2
31°
19°
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 23° to 51°, with overnight lows between 11° and 39°. The average high for December is 38° with an average low of 26°. 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.
