S
M
T
W
T
F
S
26
54°
27°
27
52°
29°
28
53°
30°
29
46°
30°
30
49°
29°
1
46°
31°
2
48°
31°
3
51°
29°
4
55°
30°
5
57°
31°
6
54°
29°
7
55°
31°
8
58°
30°
9
50°
32°
10
53°
30°
11
59°
32°
12
60°
32°
13
61°
33°
14
62°
34°
15
62°
34°
16
61°
33°
17
57°
33°
18
64°
35°
19
65°
35°
20
64°
37°
21
65°
29°
22
64°
28°
23
63°
33°
24
66°
31°
25
66°
32°
26
67°
35°
27
67°
31°
28
68°
28°
29
64°
25°
30
67°
33°
31
68°
36°
1
70°
36°
2
71°
35°
3
71°
36°
4
72°
40°
5
71°
34°
6
66°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grant
Grant's May 2026 forecast shows daily high temperatures ranging from 46° to 72°, with overnight lows between 25° and 40°. The average high for May is 61° with an average low of 32°. 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 Grant. See also: June | July | August.