S
M
T
W
T
F
S
26
82°
51°
27
83°
64°
28
76°
61°
29
69°
53°
30
65°
44°
1
64°
44°
2
65°
41°
3
71°
37°
4
82°
56°
5
66°
50°
6
61°
46°
7
66°
44°
8
75°
42°
9
80°
53°
10
76°
55°
11
76°
51°
12
80°
47°
13
79°
53°
14
73°
47°
15
83°
50°
16
82°
70°
17
87°
70°
18
88°
67°
19
86°
65°
20
70°
62°
21
67°
60°
22
67°
62°
23
74°
64°
24
75°
61°
25
81°
65°
26
78°
66°
27
82°
66°
28
82°
64°
29
79°
60°
30
78°
62°
31
79°
59°
1
80°
60°
2
77°
63°
3
79°
62°
4
82°
63°
5
81°
64°
6
83°
61°
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 75° to 83°, with overnight lows between 59° and 66°. The average high for May is 80° with an average low of 63°. 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.
