S
M
T
W
T
F
S
26
54°
46°
27
59°
46°
28
52°
46°
29
54°
48°
30
57°
48°
1
63°
45°
2
63°
50°
3
54°
50°
4
52°
45°
5
59°
41°
6
46°
37°
7
51°
39°
8
57°
43°
9
55°
46°
10
55°
45°
11
57°
46°
12
55°
45°
13
53°
44°
14
54°
45°
15
58°
48°
16
58°
48°
17
59°
49°
18
54°
49°
19
55°
50°
20
54°
47°
21
53°
46°
22
54°
49°
23
55°
52°
24
56°
52°
25
58°
51°
26
58°
52°
27
59°
51°
28
56°
47°
29
57°
47°
30
56°
49°
31
59°
51°
1
59°
50°
2
60°
51°
3
57°
48°
4
56°
51°
5
57°
50°
6
58°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grimsby
Grimsby's May 2026 forecast shows daily high temperatures ranging from 46° to 60°, with overnight lows between 37° and 54°. The average high for May is 56° with an average low of 48°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Grimsby. See also: June | July | August.
