S
M
T
W
T
F
S
30
78°
63°
31
81°
63°
1
80°
61°
2
74°
59°
3
73°
62°
4
74°
62°
5
79°
61°
6
80°
62°
7
81°
62°
8
81°
63°
9
80°
61°
10
75°
60°
11
79°
61°
12
80°
61°
13
79°
60°
14
70°
48°
15
68°
51°
16
69°
55°
17
71°
54°
18
67°
48°
19
68°
51°
20
72°
54°
21
74°
56°
22
74°
53°
23
73°
46°
24
67°
48°
25
70°
51°
26
73°
54°
27
71°
49°
28
71°
44°
29
64°
43°
30
63°
46°
1
63°
52°
2
68°
52°
3
70°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mount Clemens
Mount Clemens's September 2026 forecast shows daily high temperatures ranging from 63° to 81°, with overnight lows between 43° and 63°. The average high for September is 73° with an average low of 55°. 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 Mount Clemens. See also: October | November | December.
