S
M
T
W
T
F
S
26
50°
34°
27
57°
48°
28
64°
45°
29
47°
40°
30
51°
36°
1
47°
37°
2
48°
38°
3
49°
39°
4
53°
40°
5
55°
43°
6
56°
45°
7
54°
44°
8
59°
43°
9
58°
45°
10
63°
44°
11
62°
46°
12
66°
49°
13
67°
42°
14
59°
40°
15
59°
40°
16
60°
42°
17
61°
44°
18
63°
51°
19
68°
46°
20
61°
43°
21
62°
42°
22
62°
43°
23
63°
45°
24
67°
53°
25
73°
50°
26
65°
48°
27
65°
46°
28
66°
51°
29
71°
55°
30
75°
54°
31
70°
53°
1
73°
55°
2
76°
57°
3
77°
56°
4
77°
53°
5
68°
51°
6
69°
53°
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 47° to 77°, with overnight lows between 34° and 57°. The average high for May is 62° with an average low of 46°. 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.
