S
M
T
W
T
F
S
29
40°
24°
30
43°
26°
1
46°
26°
2
35°
18°
3
34°
15°
4
35°
14°
5
34°
21°
6
32°
13°
7
33°
15°
8
32°
13°
9
31°
12°
10
32°
11°
11
33°
14°
12
36°
16°
13
35°
15°
14
38°
18°
15
39°
22°
16
44°
23°
17
45°
23°
18
42°
22°
19
42°
23°
20
32°
22°
21
37°
14°
22
36°
12°
23
33°
12°
24
32°
12°
25
33°
16°
26
40°
17°
27
41°
17°
28
40°
12°
29
39°
15°
30
35°
18°
31
39°
12°
1
33°
11°
2
32°
18°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Cheyenne
Cheyenne's December 2026 forecast shows daily high temperatures ranging from 31° to 46°, with overnight lows between 11° and 26°. The average high for December is 37° with an average low of 17°. 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 Cheyenne. See also: January | February | March.
