S
M
T
W
T
F
S
29
40°
25°
30
37°
26°
1
36°
28°
2
40°
33°
3
41°
29°
4
48°
25°
5
41°
32°
6
37°
33°
7
40°
32°
8
44°
32°
9
39°
25°
10
45°
33°
11
45°
35°
12
Hist. Avg.
36°
24°
13
Hist. Avg.
36°
24°
14
Hist. Avg.
35°
23°
15
Hist. Avg.
35°
23°
16
Hist. Avg.
35°
23°
17
Hist. Avg.
35°
22°
18
Hist. Avg.
34°
22°
19
Hist. Avg.
34°
22°
20
Hist. Avg.
34°
22°
21
Hist. Avg.
34°
22°
22
Hist. Avg.
33°
21°
23
Hist. Avg.
33°
21°
24
Hist. Avg.
33°
21°
25
Hist. Avg.
33°
21°
26
Hist. Avg.
33°
21°
27
Hist. Avg.
33°
20°
28
Hist. Avg.
33°
20°
29
Hist. Avg.
32°
20°
30
Hist. Avg.
32°
20°
31
Hist. Avg.
32°
20°
1
Hist. Avg.
33°
20°
2
Hist. Avg.
33°
20°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Grimsby
Grimsby's December 2026 forecast shows daily high temperatures ranging from 36° to 48°, with overnight lows between 25° and 35°. The average high for December is 41° with an average low of 30°. 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.
