S
M
T
W
T
F
S
29
50°
35°
30
52°
35°
1
51°
32°
2
46°
31°
3
43°
30°
4
48°
32°
5
49°
33°
6
42°
29°
7
37°
24°
8
35°
21°
9
34°
22°
10
40°
26°
11
42°
30°
12
43°
27°
13
42°
27°
14
36°
21°
15
38°
23°
16
39°
28°
17
42°
25°
18
38°
21°
19
37°
17°
20
33°
15°
21
31°
15°
22
30°
21°
23
37°
24°
24
36°
22°
25
35°
12°
26
34°
10°
27
30°
10°
28
29°
11°
29
29°
14°
30
30°
19°
31
30°
12°
1
34°
7°
2
29°
6°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Rantoul
Rantoul's December 2026 forecast shows daily high temperatures ranging from 29° to 52°, with overnight lows between 6° and 35°. The average high for December is 38° 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 Rantoul. See also: January | February | March.
