S
M
T
W
T
F
S
26
70°
31°
27
58°
48°
28
55°
42°
29
72°
40°
30
78°
38°
1
75°
45°
2
79°
49°
3
86°
43°
4
72°
44°
5
68°
52°
6
58°
50°
7
67°
47°
8
62°
45°
9
72°
39°
10
68°
48°
11
75°
45°
12
81°
40°
13
58°
49°
14
59°
46°
15
51°
41°
16
59°
37°
17
64°
35°
18
69°
42°
19
63°
46°
20
68°
49°
21
79°
40°
22
76°
48°
23
66°
47°
24
71°
48°
25
57°
45°
26
65°
43°
27
73°
45°
28
79°
48°
29
67°
44°
30
65°
38°
31
69°
39°
1
74°
41°
2
75°
44°
3
73°
47°
4
76°
46°
5
75°
47°
6
80°
58°
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 57° to 80°, with overnight lows between 38° and 58°. The average high for May is 71° with an average low of 45°. 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.