S
M
T
W
T
F
S
26
45°
36°
27
45°
36°
28
54°
37°
29
45°
28°
30
45°
30°
1
52°
23°
2
63°
39°
3
62°
50°
4
56°
30°
5
45°
27°
6
46°
29°
7
49°
28°
8
57°
33°
9
59°
36°
10
56°
37°
11
57°
38°
12
61°
39°
13
58°
38°
14
56°
38°
15
71°
45°
16
66°
43°
17
61°
42°
18
67°
44°
19
62°
44°
20
65°
41°
21
59°
36°
22
59°
36°
23
61°
38°
24
60°
36°
25
61°
37°
26
61°
38°
27
60°
38°
28
61°
37°
29
63°
47°
30
63°
46°
31
65°
47°
1
72°
48°
2
73°
49°
3
74°
49°
4
74°
51°
5
75°
51°
6
74°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mahnomen
Mahnomen's May 2026 forecast shows daily high temperatures ranging from 45° to 75°, with overnight lows between 27° and 51°. The average high for May is 62° with an average low of 40°. 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 Mahnomen. See also: June | July | August.