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