S
M
T
W
T
F
S
26
61°
40°
27
74°
38°
28
63°
54°
29
54°
43°
30
50°
37°
1
47°
32°
2
47°
30°
3
56°
31°
4
71°
48°
5
68°
47°
6
51°
41°
7
52°
38°
8
56°
38°
9
64°
41°
10
56°
43°
11
55°
40°
12
59°
34°
13
64°
45°
14
48°
43°
15
67°
41°
16
74°
49°
17
75°
62°
18
85°
67°
19
84°
56°
20
62°
41°
21
58°
46°
22
66°
51°
23
67°
55°
24
71°
58°
25
71°
57°
26
72°
55°
27
70°
53°
28
73°
56°
29
72°
57°
30
73°
53°
31
75°
57°
1
70°
58°
2
72°
58°
3
74°
59°
4
70°
58°
5
69°
57°
6
73°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grand Island
Grand Island's May 2026 forecast shows daily high temperatures ranging from 58° to 85°, with overnight lows between 41° and 67°. The average high for May is 72° with an average low of 56°. 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 Island. See also: June | July | August.
