S
M
T
W
T
F
S
30
74°
50°
31
78°
57°
1
73°
56°
2
78°
54°
3
80°
57°
4
83°
49°
5
77°
48°
6
75°
48°
7
74°
51°
8
74°
55°
9
78°
49°
10
70°
46°
11
70°
45°
12
69°
46°
13
70°
49°
14
69°
44°
15
68°
42°
16
66°
43°
17
66°
41°
18
67°
42°
19
66°
42°
20
66°
43°
21
68°
43°
22
70°
50°
23
71°
49°
24
72°
49°
25
72°
48°
26
69°
40°
27
66°
40°
28
63°
48°
29
62°
45°
30
69°
46°
1
66°
45°
2
63°
37°
3
60°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Clintonville
Clintonville's September 2026 forecast shows daily high temperatures ranging from 60° to 83°, with overnight lows between 37° and 57°. The average high for September is 70° with an average low of 47°. 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 Clintonville. See also: October | November | December.