S
M
T
W
T
F
S
29
44°
30°
30
40°
30°
1
41°
33°
2
42°
20°
3
44°
17°
4
39°
15°
5
30°
15°
6
29°
16°
7
30°
15°
8
31°
12°
9
30°
12°
10
26°
13°
11
26°
13°
12
28°
14°
13
28°
16°
14
29°
21°
15
30°
22°
16
32°
18°
17
35°
20°
18
35°
27°
19
34°
25°
20
35°
24°
21
35°
21°
22
34°
24°
23
34°
17°
24
35°
18°
25
33°
23°
26
34°
17°
27
32°
13°
28
29°
12°
29
32°
19°
30
29°
10°
31
29°
20°
1
Hist. Avg.
31°
16°
2
Hist. Avg.
31°
16°
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 26° to 44°, with overnight lows between 10° and 33°. 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 Plainfield. See also: January | February | March.
