S
M
T
W
T
F
S
29
45°
31°
30
41°
33°
1
49°
28°
2
45°
32°
3
48°
22°
4
56°
20°
5
47°
21°
6
36°
20°
7
40°
24°
8
41°
20°
9
39°
18°
10
37°
17°
11
34°
19°
12
35°
20°
13
36°
19°
14
36°
20°
15
37°
21°
16
38°
21°
17
37°
22°
18
37°
32°
19
41°
30°
20
40°
28°
21
38°
23°
22
37°
19°
23
37°
21°
24
36°
19°
25
35°
19°
26
34°
23°
27
34°
20°
28
35°
19°
29
33°
17°
30
33°
16°
31
38°
12°
1
Hist. Avg.
38°
23°
2
Hist. Avg.
38°
23°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Mount Union
Mount Union's December 2026 forecast shows daily high temperatures ranging from 33° to 56°, with overnight lows between 12° and 33°. The average high for December is 39° with an average low of 22°. 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 Mount Union. See also: January | February | March.
