S
M
T
W
T
F
S
30
74°
69°
31
80°
69°
1
91°
73°
2
99°
73°
3
81°
66°
4
80°
67°
5
81°
59°
6
79°
58°
7
78°
57°
8
81°
57°
9
78°
70°
10
81°
59°
11
75°
55°
12
82°
60°
13
81°
56°
14
70°
51°
15
77°
65°
16
73°
62°
17
69°
62°
18
74°
54°
19
64°
58°
20
66°
53°
21
65°
47°
22
64°
53°
23
66°
51°
24
69°
48°
25
70°
49°
26
70°
50°
27
71°
51°
28
67°
55°
29
67°
55°
30
66°
54°
1
68°
54°
2
69°
55°
3
62°
52°
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 62° to 71°, with overnight lows between 47° and 55°. The average high for September is 67° 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 Mount Clemens. See also: October | November | December.
