S
M
T
W
T
F
S
26
56°
31°
27
44°
35°
28
47°
29°
29
46°
28°
30
47°
26°
1
54°
25°
2
67°
32°
3
72°
33°
4
60°
30°
5
40°
31°
6
42°
30°
7
58°
26°
8
66°
31°
9
56°
37°
10
53°
31°
11
65°
32°
12
65°
39°
13
73°
34°
14
78°
55°
15
78°
48°
16
54°
38°
17
54°
42°
18
52°
36°
19
48°
34°
20
62°
45°
21
63°
46°
22
66°
52°
23
64°
48°
24
72°
47°
25
70°
51°
26
72°
55°
27
72°
55°
28
73°
54°
29
71°
49°
30
67°
53°
31
73°
55°
1
74°
55°
2
66°
54°
3
70°
52°
4
71°
55°
5
74°
56°
6
70°
53°
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 48° to 74°, with overnight lows between 34° and 56°. The average high for May is 66° with an average low of 49°. 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.