S
M
T
W
T
F
S
26
69°
45°
27
68°
48°
28
60°
47°
29
53°
42°
30
53°
35°
1
50°
33°
2
51°
30°
3
64°
37°
4
77°
44°
5
57°
40°
6
56°
37°
7
56°
42°
8
61°
46°
9
71°
49°
10
58°
38°
11
56°
37°
12
59°
43°
13
64°
47°
14
66°
49°
15
68°
47°
16
65°
45°
17
66°
45°
18
64°
46°
19
69°
51°
20
66°
51°
21
69°
43°
22
64°
42°
23
62°
42°
24
64°
43°
25
64°
44°
26
65°
44°
27
65°
45°
28
66°
44°
29
66°
46°
30
68°
54°
31
73°
51°
1
68°
49°
2
70°
50°
3
73°
56°
4
74°
55°
5
76°
57°
6
77°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Plainwell
Plainwell's May 2026 forecast shows daily high temperatures ranging from 56° to 77°, with overnight lows between 37° and 58°. The average high for May is 66° with an average low of 47°. 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 Plainwell. See also: June | July | August.