S
M
T
W
T
F
S
29
40°
22°
30
33°
18°
1
34°
26°
2
45°
27°
3
44°
27°
4
42°
26°
5
39°
25°
6
36°
22°
7
33°
22°
8
44°
25°
9
45°
25°
10
45°
24°
11
44°
24°
12
44°
23°
13
45°
24°
14
39°
23°
15
36°
21°
16
40°
14°
17
37°
13°
18
33°
8°
19
34°
21°
20
37°
21°
21
40°
15°
22
37°
20°
23
35°
19°
24
40°
20°
25
36°
22°
26
40°
12°
27
40°
3°
28
31°
9°
29
25°
7°
30
34°
5°
31
29°
19°
1
33°
24°
2
39°
20°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Musselshell
Musselshell's December 2026 forecast shows daily high temperatures ranging from 25° to 45°, with overnight lows between 3° and 27°. The average high for December is 38° with an average low of 19°. 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 Musselshell. See also: January | February | March.
