S
M
T
W
T
F
S
26
60°
26°
27
55°
36°
28
49°
28°
29
46°
27°
30
48°
26°
1
57°
35°
2
68°
34°
3
71°
45°
4
54°
29°
5
45°
28°
6
50°
28°
7
61°
35°
8
63°
33°
9
62°
37°
10
64°
40°
11
66°
41°
12
63°
40°
13
67°
42°
14
60°
33°
15
59°
35°
16
60°
42°
17
60°
45°
18
68°
46°
19
66°
43°
20
62°
37°
21
62°
39°
22
63°
39°
23
61°
38°
24
63°
40°
25
64°
41°
26
67°
46°
27
66°
50°
28
65°
43°
29
73°
45°
30
65°
42°
31
66°
49°
1
66°
49°
2
67°
51°
3
66°
53°
4
67°
52°
5
67°
51°
6
68°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grand Forks
Grand Forks's May 2026 forecast shows daily high temperatures ranging from 45° to 73°, with overnight lows between 28° and 53°. The average high for May is 63° with an average low of 41°. 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 Grand Forks. See also: June | July | August.
