S
M
T
W
T
F
S
30
76°
43°
31
84°
49°
1
68°
56°
2
63°
54°
3
60°
54°
4
64°
53°
5
70°
55°
6
67°
53°
7
73°
52°
8
82°
48°
9
89°
50°
10
84°
50°
11
71°
45°
12
64°
52°
13
65°
48°
14
71°
49°
15
70°
49°
16
81°
49°
17
85°
50°
18
71°
48°
19
72°
44°
20
81°
48°
21
74°
49°
22
74°
51°
23
71°
48°
24
70°
44°
25
65°
47°
26
68°
40°
27
74°
46°
28
72°
40°
29
73°
54°
30
74°
54°
1
81°
46°
2
79°
47°
3
81°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Dayton
Dayton's September 2026 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.
