S
M
T
W
T
F
S
30
78°
60°
31
81°
61°
1
80°
59°
2
76°
57°
3
75°
57°
4
76°
58°
5
80°
59°
6
80°
59°
7
81°
58°
8
81°
59°
9
80°
58°
10
74°
57°
11
79°
58°
12
80°
58°
13
79°
57°
14
70°
45°
15
68°
47°
16
69°
52°
17
71°
51°
18
67°
45°
19
68°
48°
20
75°
50°
21
74°
53°
22
74°
52°
23
75°
43°
24
67°
43°
25
69°
49°
26
72°
52°
27
70°
48°
28
72°
41°
29
64°
42°
30
65°
43°
1
64°
48°
2
67°
49°
3
71°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Plainwell
Plainwell's September 2026 forecast shows daily high temperatures ranging from 64° to 81°, with overnight lows between 41° and 61°. The average high for September is 73° with an average low of 52°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Plainwell. See also: October | November | December.
