S
M
T
W
T
F
S
26
53°
41°
27
51°
42°
28
56°
39°
29
51°
36°
30
51°
32°
1
55°
35°
2
64°
32°
3
69°
40°
4
60°
40°
5
50°
33°
6
44°
37°
7
58°
34°
8
69°
31°
9
57°
37°
10
57°
35°
11
64°
33°
12
68°
49°
13
71°
42°
14
75°
53°
15
85°
52°
16
75°
47°
17
67°
55°
18
67°
45°
19
58°
39°
20
65°
43°
21
61°
44°
22
67°
45°
23
70°
48°
24
73°
50°
25
75°
54°
26
73°
47°
27
66°
46°
28
67°
47°
29
65°
46°
30
66°
45°
31
68°
46°
1
68°
44°
2
69°
49°
3
69°
55°
4
74°
57°
5
80°
57°
6
80°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grantsburg
Grantsburg's May 2026 forecast shows daily high temperatures ranging from 58° to 85°, with overnight lows between 39° and 57°. The average high for May is 70° 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 Grantsburg. See also: June | July | August.
