S
M
T
W
T
F
S
26
64°
30°
27
68°
37°
28
53°
36°
29
45°
30°
30
45°
32°
1
43°
30°
2
51°
27°
3
60°
35°
4
58°
37°
5
49°
28°
6
43°
30°
7
45°
28°
8
56°
28°
9
55°
36°
10
49°
32°
11
49°
28°
12
46°
29°
13
50°
36°
14
65°
33°
15
66°
41°
16
76°
50°
17
61°
37°
18
71°
50°
19
71°
39°
20
47°
30°
21
59°
27°
22
60°
45°
23
58°
45°
24
57°
49°
25
68°
53°
26
62°
46°
27
67°
47°
28
69°
47°
29
70°
49°
30
65°
48°
31
65°
50°
1
68°
51°
2
67°
48°
3
65°
48°
4
63°
45°
5
65°
47°
6
60°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grand Marais
Grand Marais's May 2026 forecast shows daily high temperatures ranging from 57° to 70°, with overnight lows between 45° and 53°. The average high for May is 64° 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 Grand Marais. See also: June | July | August.
