S
M
T
W
T
F
S
29
49°
36°
30
51°
36°
1
50°
37°
2
52°
35°
3
51°
30°
4
44°
26°
5
50°
32°
6
51°
34°
7
42°
30°
8
38°
25°
9
38°
22°
10
37°
23°
11
36°
30°
12
37°
29°
13
38°
27°
14
36°
19°
15
36°
23°
16
37°
27°
17
38°
30°
18
37°
28°
19
43°
24°
20
39°
18°
21
36°
18°
22
34°
20°
23
32°
24°
24
34°
23°
25
37°
24°
26
34°
18°
27
33°
15°
28
31°
11°
29
30°
12°
30
31°
27°
31
39°
21°
1
43°
17°
2
32°
14°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Mammoth
Mammoth's December 2026 forecast shows daily high temperatures ranging from 30° to 52°, with overnight lows between 11° and 37°. The average high for December is 39° with an average low of 25°. 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 Mammoth. See also: January | February | March.
