S
M
T
W
T
F
S
30
77°
68°
31
84°
72°
1
88°
73°
2
93°
75°
3
88°
71°
4
80°
68°
5
76°
65°
6
77°
66°
7
76°
64°
8
75°
63°
9
76°
65°
10
78°
63°
11
76°
62°
12
74°
60°
13
72°
61°
14
73°
59°
15
78°
65°
16
79°
64°
17
78°
63°
18
73°
63°
19
78°
64°
20
79°
65°
21
79°
64°
22
78°
64°
23
79°
63°
24
78°
62°
25
77°
62°
26
76°
60°
27
77°
61°
28
77°
60°
29
76°
59°
30
73°
59°
1
72°
58°
2
74°
59°
3
75°
58°
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 72° to 93°, with overnight lows between 58° and 75°. The average high for September is 78° with an average low of 63°. 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.
