S
M
T
W
T
F
S
29
47°
39°
30
46°
35°
1
46°
37°
2
48°
42°
3
51°
25°
4
55°
23°
5
40°
26°
6
35°
25°
7
37°
27°
8
38°
22°
9
38°
21°
10
35°
21°
11
32°
26°
12
35°
24°
13
36°
25°
14
36°
30°
15
38°
30°
16
40°
31°
17
40°
30°
18
42°
37°
19
44°
35°
20
43°
34°
21
41°
31°
22
41°
29°
23
40°
31°
24
39°
27°
25
40°
30°
26
39°
31°
27
37°
26°
28
38°
23°
29
37°
27°
30
37°
29°
31
Hist. Avg.
34°
21°
1
Hist. Avg.
35°
21°
2
Hist. Avg.
35°
21°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Grand River
Grand River's December 2026 forecast shows daily high temperatures ranging from 32° to 55°, with overnight lows between 21° and 42°. The average high for December is 40° with an average low of 29°. 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 Grand River. See also: January | February | March.
