S
M
T
W
T
F
S
29
51°
36°
30
54°
41°
1
56°
40°
2
54°
40°
3
56°
39°
4
51°
36°
5
53°
33°
6
52°
38°
7
54°
37°
8
46°
32°
9
44°
30°
10
43°
29°
11
41°
34°
12
42°
32°
13
45°
30°
14
42°
28°
15
43°
29°
16
43°
30°
17
44°
31°
18
42°
35°
19
50°
33°
20
49°
24°
21
42°
25°
22
39°
26°
23
37°
30°
24
41°
29°
25
46°
27°
26
49°
19°
27
39°
19°
28
35°
22°
29
37°
21°
30
37°
30°
31
42°
30°
1
51°
23°
2
47°
20°
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 35° to 56°, with overnight lows between 19° and 41°. The average high for December is 46° with an average low of 30°. 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.
