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