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
64°
35°
23
60°
45°
24
60°
45°
25
N/A
26
57°
40°
27
53°
40°
28
55°
43°
29
54°
42°
30
64°
44°
31
66°
44°
1
65°
45°
2
67°
49°
3
68°
50°
4
67°
49°
5
66°
48°
6
68°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Grand Marais
Grand Marais's May 2026 forecast shows daily high temperatures ranging from 53° to 68°, with overnight lows between 40° and 50°. The average high for May is 63° with an average low of 45°. 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.
