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