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