S
M
T
W
T
F
S
30
81°
56°
31
78°
53°
1
77°
54°
2
76°
55°
3
77°
57°
4
77°
54°
5
78°
55°
6
74°
60°
7
78°
56°
8
76°
55°
9
76°
55°
10
75°
52°
11
74°
52°
12
75°
54°
13
74°
53°
14
73°
54°
15
74°
57°
16
76°
55°
17
77°
52°
18
79°
50°
19
73°
57°
20
79°
55°
21
78°
54°
22
Hist. Avg.
75°
50°
23
Hist. Avg.
75°
49°
24
Hist. Avg.
74°
49°
25
Hist. Avg.
74°
48°
26
Hist. Avg.
74°
48°
27
Hist. Avg.
73°
48°
28
Hist. Avg.
73°
47°
29
Hist. Avg.
72°
47°
30
Hist. Avg.
72°
47°
1
Hist. Avg.
72°
46°
2
Hist. Avg.
71°
46°
3
Hist. Avg.
71°
46°
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 73° to 81°, with overnight lows between 50° and 60°. The average high for September is 76° with an average low of 55°. 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.
