S
M
T
W
T
F
S
30
75°
60°
31
76°
59°
1
75°
61°
2
76°
60°
3
76°
60°
4
78°
59°
5
77°
59°
6
76°
60°
7
74°
57°
8
75°
56°
9
73°
60°
10
73°
56°
11
74°
56°
12
73°
55°
13
75°
62°
14
76°
57°
15
78°
58°
16
78°
62°
17
77°
63°
18
80°
62°
19
79°
53°
20
75°
53°
21
69°
59°
22
69°
58°
23
73°
59°
24
74°
60°
25
75°
51°
26
74°
49°
27
70°
51°
28
64°
50°
29
65°
50°
30
66°
49°
1
65°
56°
2
Hist. Avg.
67°
51°
3
Hist. Avg.
67°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Port Clinton
Port Clinton's September 2026 forecast shows daily high temperatures ranging from 64° to 80°, with overnight lows between 49° and 63°. The average high for September is 74° with an average low of 57°. 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 Port Clinton. See also: October | November | December.
