S
M
T
W
T
F
S
29
36°
25°
30
38°
25°
1
36°
26°
2
39°
26°
3
38°
25°
4
40°
25°
5
42°
24°
6
42°
25°
7
41°
23°
8
35°
23°
9
33°
22°
10
37°
23°
11
32°
13°
12
30°
10°
13
28°
15°
14
31°
18°
15
38°
19°
16
36°
20°
17
41°
21°
18
37°
19°
19
37°
18°
20
39°
20°
21
38°
18°
22
37°
17°
23
37°
9°
24
34°
6°
25
23°
15°
26
31°
17°
27
31°
19°
28
35°
13°
29
36°
18°
30
34°
17°
31
34°
16°
1
33°
3°
2
34°
2°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Plankinton
Plankinton's December 2026 forecast shows daily high temperatures ranging from 23° to 42°, with overnight lows between 2° and 26°. The average high for December is 36° 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 Plankinton. See also: January | February | March.