S
M
T
W
T
F
S
29
44°
31°
30
44°
31°
1
43°
30°
2
42°
30°
3
42°
29°
4
43°
29°
5
41°
28°
6
36°
26°
7
33°
20°
8
28°
18°
9
30°
22°
10
36°
27°
11
37°
27°
12
39°
26°
13
35°
26°
14
29°
24°
15
33°
22°
16
35°
24°
17
36°
25°
18
33°
21°
19
34°
19°
20
30°
13°
21
31°
16°
22
24°
18°
23
33°
22°
24
31°
20°
25
34°
9°
26
30°
10°
27
24°
8°
28
25°
8°
29
25°
13°
30
23°
18°
31
25°
11°
1
31°
7°
2
22°
6°
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 22° to 44°, with overnight lows between 6° and 31°. The average high for December is 33° with an average low of 20°. 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.
