S
M
T
W
T
F
S
26
57°
41°
27
57°
37°
28
61°
34°
29
72°
34°
30
72°
37°
1
73°
39°
2
72°
45°
3
72°
46°
4
58°
43°
5
69°
46°
6
74°
45°
7
80°
43°
8
79°
44°
9
78°
48°
10
82°
50°
11
88°
51°
12
87°
49°
13
88°
50°
14
85°
50°
15
82°
47°
16
80°
48°
17
82°
54°
18
75°
45°
19
74°
48°
20
76°
49°
21
76°
49°
22
75°
48°
23
76°
50°
24
77°
50°
25
78°
49°
26
78°
50°
27
77°
50°
28
76°
49°
29
72°
49°
30
72°
50°
31
74°
51°
1
76°
51°
2
79°
50°
3
79°
51°
4
78°
52°
5
80°
52°
6
77°
48°
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 58° to 88°, with overnight lows between 43° and 54°. The average high for May is 78° with an average low of 49°. 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.
