S
M
T
W
T
F
S
29
42°
28°
30
45°
30°
1
46°
29°
2
44°
30°
3
46°
28°
4
44°
27°
5
44°
26°
6
41°
27°
7
44°
26°
8
38°
24°
9
34°
25°
10
35°
22°
11
34°
24°
12
34°
21°
13
36°
17°
14
37°
13°
15
31°
13°
16
29°
16°
17
30°
15°
18
29°
21°
19
34°
20°
20
38°
17°
21
33°
14°
22
30°
14°
23
29°
8°
24
31°
16°
25
29°
11°
26
34°
5°
27
27°
6°
28
22°
6°
29
27°
4°
30
24°
8°
31
26°
17°
1
39°
12°
2
37°
6°
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 22° to 46°, with overnight lows between 4° and 30°. The average high for December is 35° with an average low of 18°. 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.
