S
M
T
W
T
F
S
26
44°
36°
27
45°
37°
28
53°
37°
29
43°
30°
30
41°
27°
1
49°
23°
2
63°
26°
3
65°
38°
4
58°
35°
5
41°
30°
6
42°
28°
7
51°
27°
8
63°
27°
9
55°
38°
10
49°
32°
11
52°
25°
12
61°
36°
13
67°
39°
14
66°
41°
15
78°
51°
16
71°
40°
17
48°
42°
18
60°
40°
19
46°
33°
20
51°
35°
21
58°
45°
22
66°
44°
23
64°
48°
24
65°
49°
25
65°
51°
26
66°
48°
27
65°
51°
28
78°
55°
29
59°
46°
30
60°
44°
31
64°
45°
1
63°
42°
2
62°
44°
3
63°
52°
4
71°
53°
5
74°
54°
6
74°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Hermantown
Hermantown's May 2026 forecast shows daily high temperatures ranging from 46° to 78°, with overnight lows between 33° and 55°. The average high for May is 64° 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 Hermantown. See also: June | July | August.