S
M
T
W
T
F
S
26
55°
39°
27
70°
37°
28
66°
50°
29
59°
48°
30
50°
34°
1
54°
30°
2
46°
36°
3
57°
28°
4
72°
41°
5
73°
59°
6
57°
46°
7
59°
32°
8
61°
34°
9
64°
46°
10
63°
37°
11
63°
32°
12
68°
32°
13
66°
46°
14
46°
43°
15
64°
41°
16
72°
43°
17
84°
57°
18
88°
57°
19
82°
68°
20
73°
52°
21
63°
50°
22
64°
48°
23
57°
48°
24
73°
50°
25
77°
55°
26
82°
62°
27
76°
53°
28
72°
46°
29
74°
48°
30
70°
44°
31
69°
45°
1
68°
46°
2
72°
47°
3
69°
53°
4
72°
54°
5
79°
56°
6
80°
57°
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 68° to 82°, with overnight lows between 44° and 62°. The average high for May is 74° with an average low of 51°. 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.
