S
M
T
W
T
F
S
26
61°
31°
27
65°
34°
28
68°
36°
29
73°
37°
30
77°
40°
1
77°
40°
2
80°
47°
3
84°
42°
4
82°
51°
5
82°
47°
6
82°
43°
7
83°
52°
8
74°
45°
9
78°
44°
10
75°
47°
11
76°
43°
12
81°
46°
13
70°
49°
14
66°
46°
15
56°
36°
16
53°
38°
17
71°
34°
18
65°
37°
19
69°
44°
20
74°
46°
21
76°
39°
22
75°
46°
23
82°
50°
24
82°
49°
25
82°
48°
26
72°
52°
27
85°
57°
28
93°
60°
29
84°
53°
30
66°
49°
31
75°
49°
1
81°
51°
2
89°
52°
3
86°
53°
4
88°
52°
5
78°
52°
6
81°
51°
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 66° to 93°, with overnight lows between 49° and 60°. The average high for May is 82° with an average low of 53°. 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.
