S
M
T
W
T
F
S
29
31°
16°
30
32°
24°
1
33°
19°
2
34°
25°
3
35°
22°
4
46°
20°
5
45°
20°
6
31°
19°
7
30°
18°
8
32°
15°
9
29°
16°
10
28°
16°
11
27°
14°
12
28°
16°
13
29°
20°
14
31°
22°
15
32°
24°
16
35°
24°
17
36°
23°
18
35°
25°
19
37°
23°
20
36°
22°
21
34°
21°
22
32°
19°
23
31°
16°
24
30°
20°
25
31°
18°
26
30°
21°
27
30°
21°
28
31°
18°
29
31°
18°
30
33°
6°
31
30°
3°
1
Hist. Avg.
30°
13°
2
Hist. Avg.
29°
13°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Belleville
Belleville's December 2026 forecast shows daily high temperatures ranging from 27° to 46°, with overnight lows between 3° and 25°. The average high for December is 33° with an average low of 19°. 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 Belleville. See also: January | February | March.
