S
M
T
W
T
F
S
29
50°
30°
30
58°
21°
1
56°
24°
2
50°
24°
3
48°
22°
4
47°
25°
5
47°
33°
6
55°
35°
7
57°
32°
8
57°
26°
9
56°
20°
10
46°
20°
11
48°
29°
12
50°
33°
13
55°
35°
14
57°
36°
15
55°
35°
16
56°
26°
17
57°
23°
18
47°
25°
19
45°
20°
20
42°
16°
21
53°
14°
22
35°
18°
23
38°
17°
24
38°
15°
25
37°
17°
26
40°
24°
27
40°
26°
28
44°
28°
29
41°
29°
30
52°
23°
31
49°
23°
1
45°
21°
2
43°
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 35° to 58°, with overnight lows between 14° and 36°. The average high for December is 48° with an average low of 25°. 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.
