S
M
T
W
T
F
S
29
36°
22°
30
35°
17°
1
37°
8°
2
32°
6°
3
25°
10°
4
30°
15°
5
35°
19°
6
35°
21°
7
34°
22°
8
36°
22°
9
36°
20°
10
35°
17°
11
36°
18°
12
33°
17°
13
31°
18°
14
32°
17°
15
34°
9°
16
29°
7°
17
26°
13°
18
29°
6°
19
25°
15°
20
25°
18°
21
33°
19°
22
35°
18°
23
34°
5°
24
23°
6°
25
Hist. Avg.
25°
0°
26
Hist. Avg.
25°
0°
27
Hist. Avg.
25°
0°
28
Hist. Avg.
25°
0°
29
Hist. Avg.
25°
0°
30
Hist. Avg.
25°
0°
31
Hist. Avg.
25°
0°
1
Hist. Avg.
25°
0°
2
Hist. Avg.
25°
0°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Yellowstone National Park
Yellowstone National Park's December 2026 forecast shows daily high temperatures ranging from 23° to 37°, with overnight lows between 5° and 22°. The average high for December is 32° with an average low of 15°. 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 Yellowstone National Park. See also: January | February | March.
