S
M
T
W
T
F
S
26
86°
69°
27
86°
69°
28
87°
68°
29
85°
68°
30
85°
63°
31
81°
62°
1
79°
64°
2
80°
63°
3
82°
67°
4
84°
66°
5
86°
68°
6
87°
69°
7
83°
67°
8
82°
64°
9
83°
62°
10
84°
62°
11
84°
68°
12
88°
69°
13
89°
68°
14
90°
69°
15
89°
68°
16
90°
69°
17
90°
61°
18
86°
59°
19
82°
59°
20
81°
60°
21
81°
59°
22
82°
59°
23
82°
60°
24
83°
60°
25
86°
61°
26
87°
61°
27
88°
59°
28
82°
59°
29
81°
58°
30
81°
57°
31
83°
61°
1
85°
58°
2
81°
57°
3
80°
64°
4
86°
65°
5
86°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Dayton
Dayton's August 2026 forecast shows daily high temperatures ranging from 79° to 90°, with overnight lows between 57° and 69°. The average high for August is 84° with an average low of 63°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Dayton. See also: September | October | November.
