S
M
T
W
T
F
S
29
45°
32°
30
49°
26°
1
47°
21°
2
42°
26°
3
40°
32°
4
50°
27°
5
47°
29°
6
46°
32°
7
47°
32°
8
51°
29°
9
49°
27°
10
44°
30°
11
46°
29°
12
47°
28°
13
45°
21°
14
40°
24°
15
38°
31°
16
48°
27°
17
49°
25°
18
43°
26°
19
45°
22°
20
43°
25°
21
39°
28°
22
46°
27°
23
47°
28°
24
45°
27°
25
45°
23°
26
43°
19°
27
39°
19°
28
38°
21°
29
39°
18°
30
38°
21°
31
37°
25°
1
43°
17°
2
47°
11°
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 37° to 51°, with overnight lows between 11° and 32°. The average high for December is 44° with an average low of 25°. 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.
