S
M
T
W
T
F
S
26
56°
37°
27
57°
35°
28
64°
36°
29
57°
32°
30
59°
40°
1
62°
40°
2
60°
36°
3
64°
40°
4
68°
45°
5
70°
44°
6
69°
46°
7
72°
47°
8
72°
48°
9
71°
45°
10
66°
42°
11
62°
41°
12
63°
42°
13
65°
46°
14
63°
43°
15
67°
43°
16
70°
49°
17
73°
49°
18
69°
38°
19
67°
38°
20
65°
39°
21
64°
38°
22
65°
39°
23
66°
41°
24
65°
47°
25
68°
47°
26
72°
44°
27
69°
43°
28
69°
52°
29
70°
50°
30
81°
43°
31
71°
50°
1
72°
45°
2
74°
50°
3
74°
55°
4
81°
46°
5
79°
45°
6
71°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grattan Township
Grattan Township's May 2026 forecast shows daily high temperatures ranging from 56° to 81°, with overnight lows between 32° and 55°. The average high for May is 68° with an average low of 43°. 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 Grattan Township. See also: June | July | August.
