S
M
T
W
T
F
S
30
76°
60°
31
77°
61°
1
77°
60°
2
76°
52°
3
73°
49°
4
68°
53°
5
69°
59°
6
74°
55°
7
76°
52°
8
67°
50°
9
68°
52°
10
70°
57°
11
67°
58°
12
75°
57°
13
74°
56°
14
74°
52°
15
67°
48°
16
65°
50°
17
65°
49°
18
64°
46°
19
68°
45°
20
64°
43°
21
61°
49°
22
63°
53°
23
66°
47°
24
65°
45°
25
62°
53°
26
68°
53°
27
66°
51°
28
70°
45°
29
68°
46°
30
59°
50°
1
61°
48°
2
66°
50°
3
63°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Petoskey
Petoskey's September 2026 forecast shows daily high temperatures ranging from 59° to 77°, with overnight lows between 43° and 61°. The average high for September is 68° 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 Petoskey. See also: October | November | December.
