S
M
T
W
T
F
S
30
69°
63°
31
75°
69°
1
79°
70°
2
84°
70°
3
74°
63°
4
71°
66°
5
72°
67°
6
71°
68°
7
72°
57°
8
74°
68°
9
75°
62°
10
72°
53°
11
72°
59°
12
79°
63°
13
72°
56°
14
69°
61°
15
72°
56°
16
66°
54°
17
65°
52°
18
62°
49°
19
63°
50°
20
61°
48°
21
66°
50°
22
64°
55°
23
66°
56°
24
68°
56°
25
72°
55°
26
69°
55°
27
67°
54°
28
71°
56°
29
72°
57°
30
72°
57°
1
71°
54°
2
68°
52°
3
59°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Harbor Beach
Harbor Beach's September 2026 forecast shows daily high temperatures ranging from 59° to 79°, with overnight lows between 47° and 68°. The average high for September is 69° 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 Harbor Beach. See also: October | November | December.
