S
M
T
W
T
F
S
30
66°
51°
31
67°
49°
1
66°
51°
2
66°
55°
3
69°
51°
4
71°
50°
5
66°
56°
6
68°
59°
7
72°
55°
8
71°
49°
9
71°
50°
10
62°
51°
11
63°
55°
12
64°
54°
13
70°
55°
14
70°
53°
15
Hist. Avg.
66°
52°
16
Hist. Avg.
66°
51°
17
Hist. Avg.
66°
51°
18
Hist. Avg.
65°
50°
19
Hist. Avg.
65°
50°
20
Hist. Avg.
64°
50°
21
Hist. Avg.
64°
49°
22
Hist. Avg.
63°
49°
23
Hist. Avg.
63°
48°
24
Hist. Avg.
62°
48°
25
Hist. Avg.
62°
48°
26
Hist. Avg.
62°
47°
27
Hist. Avg.
61°
47°
28
Hist. Avg.
61°
46°
29
Hist. Avg.
60°
46°
30
Hist. Avg.
60°
45°
1
Hist. Avg.
59°
45°
2
Hist. Avg.
59°
45°
3
Hist. Avg.
58°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Dayton
Dayton's September 2026 forecast shows daily high temperatures ranging from 62° to 72°, with overnight lows between 49° and 59°. The average high for September is 68° 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 Dayton. See also: October | November | December.
