S
M
T
W
T
F
S
30
78°
56°
31
77°
56°
1
77°
57°
2
78°
58°
3
76°
59°
4
76°
57°
5
79°
57°
6
78°
56°
7
76°
54°
8
75°
55°
9
74°
55°
10
75°
57°
11
74°
53°
12
74°
53°
13
75°
52°
14
77°
58°
15
76°
58°
16
77°
57°
17
75°
51°
18
72°
50°
19
73°
51°
20
76°
56°
21
72°
50°
22
71°
53°
23
76°
55°
24
75°
56°
25
76°
54°
26
75°
47°
27
73°
48°
28
67°
47°
29
66°
46°
30
67°
46°
1
68°
47°
2
Hist. Avg.
71°
50°
3
Hist. Avg.
70°
50°
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 66° to 79°, with overnight lows between 46° and 59°. The average high for September is 74° with an average low of 53°. 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.
