S
M
T
W
T
F
S
29
47°
37°
30
49°
37°
1
47°
36°
2
48°
36°
3
47°
35°
4
44°
35°
5
46°
34°
6
47°
34°
7
41°
31°
8
37°
30°
9
36°
30°
10
36°
31°
11
38°
33°
12
40°
32°
13
37°
32°
14
35°
25°
15
36°
26°
16
37°
26°
17
36°
29°
18
37°
30°
19
41°
26°
20
38°
23°
21
35°
24°
22
35°
25°
23
31°
25°
24
36°
24°
25
33°
23°
26
32°
12°
27
30°
12°
28
30°
10°
29
31°
12°
30
29°
22°
31
31°
24°
1
36°
17°
2
32°
19°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Grimsby
Grimsby's December 2026 forecast shows daily high temperatures ranging from 29° to 49°, with overnight lows between 10° and 37°. The average high for December is 38° with an average low of 27°. 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 Grimsby. See also: January | February | March.
