S
M
T
W
T
F
S
26
75°
54°
27
70°
47°
28
60°
45°
29
60°
41°
30
61°
38°
1
60°
37°
2
61°
36°
3
72°
48°
4
82°
53°
5
56°
46°
6
58°
41°
7
69°
39°
8
69°
43°
9
78°
49°
10
69°
38°
11
78°
43°
12
82°
56°
13
74°
47°
14
78°
47°
15
87°
60°
16
83°
62°
17
81°
61°
18
77°
61°
19
64°
45°
20
63°
41°
21
64°
50°
22
69°
56°
23
73°
57°
24
78°
55°
25
81°
57°
26
81°
60°
27
81°
61°
28
79°
65°
29
77°
61°
30
76°
58°
31
76°
55°
1
77°
54°
2
76°
56°
3
75°
57°
4
77°
59°
5
79°
60°
6
78°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grant City
Grant City's May 2026 forecast shows daily high temperatures ranging from 75° to 81°, with overnight lows between 54° and 65°. The average high for May is 78° with an average low of 58°. 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 City. See also: June | July | August.
