S
M
T
W
T
F
S
26
61°
38°
27
70°
38°
28
65°
47°
29
71°
47°
30
62°
41°
1
67°
47°
2
64°
45°
3
61°
44°
4
74°
54°
5
85°
63°
6
72°
51°
7
66°
47°
8
64°
49°
9
61°
46°
10
79°
53°
11
62°
42°
12
63°
45°
13
65°
51°
14
73°
52°
15
71°
53°
16
71°
51°
17
67°
50°
18
71°
52°
19
73°
51°
20
67°
47°
21
68°
48°
22
67°
50°
23
68°
49°
24
69°
51°
25
72°
56°
26
77°
56°
27
72°
55°
28
74°
54°
29
71°
50°
30
75°
58°
31
79°
59°
1
78°
59°
2
76°
58°
3
77°
58°
4
80°
60°
5
80°
60°
6
79°
61°
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 61° to 80°, with overnight lows between 42° and 61°. The average high for May is 71° with an average low of 53°. 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.
