S
M
T
W
T
F
S
26
54°
34°
27
46°
37°
28
48°
32°
29
54°
28°
30
52°
27°
1
55°
25°
2
72°
32°
3
72°
41°
4
50°
33°
5
46°
31°
6
51°
31°
7
65°
39°
8
68°
41°
9
63°
35°
10
58°
39°
11
65°
42°
12
72°
47°
13
69°
43°
14
71°
48°
15
74°
49°
16
71°
49°
17
69°
46°
18
70°
51°
19
69°
51°
20
68°
45°
21
63°
42°
22
64°
43°
23
65°
44°
24
65°
44°
25
66°
45°
26
65°
44°
27
65°
45°
28
67°
46°
29
69°
52°
30
67°
47°
31
70°
52°
1
76°
57°
2
78°
58°
3
79°
59°
4
80°
60°
5
80°
60°
6
79°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Wahpeton
Wahpeton's May 2026 forecast shows daily high temperatures ranging from 46° to 80°, with overnight lows between 31° and 60°. The average high for May is 68° 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 Wahpeton. See also: June | July | August.