S
M
T
W
T
F
S
29
54°
35°
30
54°
32°
1
45°
33°
2
54°
33°
3
50°
29°
4
41°
25°
5
44°
31°
6
43°
32°
7
44°
31°
8
43°
32°
9
44°
32°
10
45°
31°
11
40°
30°
12
41°
29°
13
44°
23°
14
37°
29°
15
46°
28°
16
44°
30°
17
47°
30°
18
49°
29°
19
44°
28°
20
39°
25°
21
34°
26°
22
48°
28°
23
46°
28°
24
37°
25°
25
33°
16°
26
35°
21°
27
39°
21°
28
36°
18°
29
32°
19°
30
34°
10°
31
33°
7°
1
29°
12°
2
28°
11°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Mosby
Mosby's December 2026 forecast shows daily high temperatures ranging from 28° to 54°, with overnight lows between 7° and 35°. The average high for December is 42° with an average low of 26°. 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 Mosby. See also: January | February | March.