S
M
T
W
T
F
S
26
79°
55°
27
79°
52°
28
70°
57°
29
81°
63°
30
68°
52°
1
70°
50°
2
66°
46°
3
68°
39°
4
77°
43°
5
79°
48°
6
72°
63°
7
66°
50°
8
72°
43°
9
77°
52°
10
82°
52°
11
73°
54°
12
77°
50°
13
81°
52°
14
72°
52°
15
77°
41°
16
85°
59°
17
90°
64°
18
89°
66°
19
86°
65°
20
84°
64°
21
79°
60°
22
78°
61°
23
79°
61°
24
77°
62°
25
78°
62°
26
80°
61°
27
83°
60°
28
82°
62°
29
80°
59°
30
83°
63°
31
81°
62°
1
83°
63°
2
84°
64°
3
84°
63°
4
78°
61°
5
78°
58°
6
83°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Dayton
Dayton's May 2026 forecast shows daily high temperatures ranging from 77° to 90°, with overnight lows between 58° and 66°. The average high for May is 82° with an average low of 62°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Dayton. See also: June | July | August.
