S
M
T
W
T
F
S
30
72°
64°
31
80°
65°
1
87°
71°
2
88°
69°
3
83°
66°
4
75°
66°
5
77°
57°
6
76°
53°
7
75°
51°
8
78°
55°
9
85°
68°
10
80°
65°
11
75°
57°
12
75°
58°
13
80°
63°
14
66°
52°
15
76°
51°
16
N/A
17
76°
62°
18
74°
55°
19
71°
64°
20
69°
54°
21
68°
57°
22
68°
59°
23
67°
54°
24
69°
53°
25
70°
53°
26
70°
52°
27
68°
54°
28
72°
53°
29
70°
52°
30
69°
47°
1
70°
54°
2
64°
52°
3
61°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Conneaut Lake
Conneaut Lake's September 2026 forecast shows daily high temperatures ranging from 61° to 76°, with overnight lows between 47° and 64°. The average high for September is 69° with an average low of 54°. 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 Conneaut Lake. See also: October | November | December.
