S
M
T
W
T
F
S
29
41°
28°
30
44°
32°
1
45°
31°
2
43°
31°
3
45°
29°
4
42°
27°
5
43°
28°
6
40°
29°
7
43°
28°
8
36°
26°
9
33°
27°
10
34°
25°
11
34°
26°
12
35°
24°
13
35°
19°
14
35°
17°
15
31°
16°
16
30°
17°
17
31°
18°
18
30°
23°
19
33°
22°
20
36°
19°
21
32°
17°
22
30°
17°
23
29°
9°
24
31°
17°
25
26°
14°
26
31°
6°
27
26°
5°
28
21°
6°
29
24°
3°
30
23°
8°
31
24°
19°
1
37°
13°
2
36°
8°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Plainfield
Plainfield's December 2026 forecast shows daily high temperatures ranging from 21° to 45°, with overnight lows between 3° and 32°. The average high for December is 34° with an average low of 20°. 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 Plainfield. See also: January | February | March.
