S
M
T
W
T
F
S
30
74°
54°
31
75°
60°
1
74°
62°
2
80°
62°
3
75°
53°
4
73°
52°
5
71°
53°
6
70°
54°
7
72°
60°
8
77°
59°
9
78°
60°
10
79°
54°
11
72°
55°
12
70°
58°
13
70°
51°
14
69°
53°
15
67°
53°
16
68°
50°
17
69°
56°
18
74°
47°
19
67°
49°
20
69°
46°
21
70°
49°
22
67°
53°
23
71°
55°
24
74°
56°
25
73°
55°
26
72°
56°
27
73°
55°
28
75°
51°
29
71°
52°
30
70°
55°
1
71°
52°
2
73°
45°
3
70°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Muskegon
Muskegon's September 2026 forecast shows daily high temperatures ranging from 67° to 80°, with overnight lows between 41° and 62°. The average high for September is 72° 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 Muskegon. See also: October | November | December.
