S
M
T
W
T
F
S
29
39°
29°
30
40°
31°
1
41°
29°
2
41°
31°
3
40°
31°
4
41°
28°
5
43°
26°
6
42°
28°
7
39°
23°
8
40°
32°
9
45°
36°
10
47°
32°
11
52°
26°
12
36°
24°
13
40°
29°
14
Hist. Avg.
39°
25°
15
Hist. Avg.
39°
25°
16
Hist. Avg.
38°
25°
17
Hist. Avg.
38°
25°
18
Hist. Avg.
38°
24°
19
Hist. Avg.
38°
24°
20
Hist. Avg.
37°
24°
21
Hist. Avg.
37°
24°
22
Hist. Avg.
37°
24°
23
Hist. Avg.
36°
23°
24
Hist. Avg.
36°
23°
25
Hist. Avg.
36°
23°
26
Hist. Avg.
36°
23°
27
Hist. Avg.
36°
22°
28
Hist. Avg.
35°
22°
29
Hist. Avg.
35°
22°
30
Hist. Avg.
35°
22°
31
Hist. Avg.
35°
22°
1
Hist. Avg.
35°
21°
2
Hist. Avg.
35°
21°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Sangamon
Sangamon's December 2026 forecast shows daily high temperatures ranging from 36° to 52°, with overnight lows between 23° and 36°. The average high for December is 42° with an average low of 29°. 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 Sangamon. See also: January | February | March.
