S
M
T
W
T
F
S
29
48°
25°
30
45°
25°
1
37°
24°
2
43°
24°
3
37°
25°
4
39°
25°
5
48°
24°
6
50°
24°
7
46°
23°
8
47°
22°
9
39°
22°
10
40°
23°
11
36°
7°
12
33°
7°
13
33°
13°
14
40°
15°
15
43°
18°
16
44°
19°
17
47°
17°
18
42°
19°
19
46°
20°
20
47°
16°
21
46°
21°
22
48°
11°
23
42°
6°
24
35°
6°
25
31°
14°
26
41°
18°
27
41°
21°
28
40°
20°
29
46°
20°
30
43°
19°
31
41°
11°
1
38°
3°
2
35°
2°
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 31° to 50°, with overnight lows between 2° and 25°. The average high for December is 42° with an average low of 17°. 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.