S
M
T
W
T
F
S
30
79°
66°
31
82°
69°
1
84°
70°
2
85°
71°
3
84°
70°
4
80°
69°
5
79°
64°
6
79°
57°
7
79°
56°
8
77°
55°
9
77°
62°
10
78°
48°
11
79°
57°
12
80°
61°
13
78°
60°
14
75°
66°
15
72°
55°
16
71°
56°
17
70°
53°
18
68°
54°
19
64°
49°
20
66°
50°
21
65°
52°
22
67°
49°
23
67°
55°
24
72°
55°
25
66°
53°
26
73°
55°
27
73°
54°
28
72°
53°
29
72°
54°
30
71°
52°
1
70°
51°
2
64°
52°
3
69°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Coopersville
Coopersville's September 2026 forecast shows daily high temperatures ranging from 64° to 80°, with overnight lows between 48° and 66°. The average high for September is 71° with an average low of 54°. 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 Coopersville. See also: October | November | December.