S
M
T
W
T
F
S
29
66°
45°
30
66°
37°
1
55°
32°
2
50°
31°
3
52°
38°
4
56°
43°
5
53°
38°
6
51°
34°
7
51°
30°
8
48°
29°
9
48°
29°
10
49°
31°
11
53°
32°
12
55°
37°
13
54°
37°
14
53°
33°
15
51°
33°
16
47°
34°
17
48°
31°
18
47°
28°
19
46°
27°
20
46°
28°
21
49°
31°
22
54°
31°
23
47°
28°
24
44°
26°
25
44°
27°
26
45°
30°
27
46°
29°
28
47°
30°
29
47°
28°
30
48°
30°
31
48°
27°
1
45°
27°
2
46°
33°
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 44° to 66°, with overnight lows between 26° and 45°. The average high for December is 50° with an average low of 32°. 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.