S
M
T
W
T
F
S
30
91°
67°
31
94°
68°
1
95°
70°
2
95°
70°
3
93°
72°
4
92°
67°
5
89°
65°
6
87°
67°
7
87°
64°
8
91°
66°
9
90°
67°
10
89°
59°
11
79°
59°
12
84°
60°
13
84°
61°
14
83°
62°
15
85°
63°
16
84°
62°
17
84°
62°
18
80°
61°
19
74°
62°
20
82°
61°
21
82°
61°
22
81°
60°
23
82°
60°
24
81°
58°
25
76°
56°
26
77°
57°
27
80°
58°
28
80°
57°
29
79°
57°
30
80°
56°
1
80°
57°
2
79°
57°
3
79°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cincinnati
Cincinnati's September 2026 forecast shows daily high temperatures ranging from 74° to 95°, with overnight lows between 56° and 72°. The average high for September is 84° with an average low of 62°. 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 Cincinnati. See also: October | November | December.
