S
M
T
W
T
F
S
29
37°
23°
30
38°
23°
1
37°
21°
2
38°
10°
3
33°
4°
4
27°
4°
5
20°
6°
6
21°
7°
7
23°
1°
8
22°
2°
9
17°
1°
10
17°
3°
11
18°
5°
12
21°
8°
13
24°
17°
14
29°
19°
15
33°
18°
16
33°
19°
17
34°
18°
18
34°
18°
19
33°
16°
20
32°
12°
21
28°
15°
22
27°
13°
23
29°
7°
24
27°
10°
25
21°
5°
26
24°
9°
27
22°
16°
28
29°
15°
29
30°
13°
30
15°
-6°
31
25°
11°
1
23°
0°
2
Hist. Avg.
22°
5°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Willmar
Willmar's December 2026 forecast shows daily high temperatures ranging from 15° to 38°, with overnight lows between -6° and 23°. The average high for December is 27° with an average low of 11°. 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 Willmar. See also: January | February | March.
