S
M
T
W
T
F
S
31
78°
41°
1
80°
47°
2
79°
48°
3
81°
45°
4
78°
45°
5
77°
59°
6
84°
63°
7
64°
53°
8
71°
42°
9
71°
38°
10
70°
38°
11
78°
39°
12
72°
41°
13
75°
41°
14
78°
46°
15
74°
47°
16
76°
42°
17
72°
40°
18
79°
49°
19
77°
41°
20
67°
32°
21
70°
32°
22
70°
33°
23
79°
51°
24
65°
57°
25
70°
58°
26
79°
57°
27
72°
51°
28
85°
50°
29
80°
42°
30
73°
45°
1
64°
37°
2
64°
32°
3
74°
35°
4
83°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Dayton
Dayton's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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.
