S
M
T
W
T
F
S
29
48°
20°
30
48°
17°
1
36°
17°
2
32°
20°
3
34°
28°
4
37°
29°
5
41°
28°
6
40°
29°
7
42°
27°
8
43°
25°
9
37°
22°
10
36°
23°
11
35°
18°
12
36°
17°
13
31°
14°
14
30°
12°
15
28°
17°
16
30°
15°
17
Hist. Avg.
34°
20°
18
Hist. Avg.
34°
20°
19
Hist. Avg.
34°
20°
20
Hist. Avg.
33°
19°
21
Hist. Avg.
33°
19°
22
Hist. Avg.
33°
19°
23
Hist. Avg.
33°
19°
24
Hist. Avg.
32°
18°
25
Hist. Avg.
32°
18°
26
Hist. Avg.
32°
18°
27
Hist. Avg.
32°
18°
28
Hist. Avg.
32°
18°
29
Hist. Avg.
32°
18°
30
Hist. Avg.
32°
18°
31
Hist. Avg.
32°
17°
1
Hist. Avg.
32°
17°
2
Hist. Avg.
31°
17°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Wheaton
Wheaton's December 2026 forecast shows daily high temperatures ranging from 28° to 48°, with overnight lows between 12° and 29°. The average high for December is 37° with an average low of 21°. 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 Wheaton. See also: January | February | March.
