S
M
T
W
T
F
S
26
63°
36°
27
67°
40°
28
68°
44°
29
69°
45°
30
68°
45°
1
71°
46°
2
71°
47°
3
70°
46°
4
71°
47°
5
70°
39°
6
59°
37°
7
59°
37°
8
60°
38°
9
63°
38°
10
70°
45°
11
65°
41°
12
72°
48°
13
73°
48°
14
73°
42°
15
64°
41°
16
65°
42°
17
66°
46°
18
72°
49°
19
73°
43°
20
64°
47°
21
72°
43°
22
66°
42°
23
64°
47°
24
71°
43°
25
65°
48°
26
67°
48°
27
74°
47°
28
67°
44°
29
66°
48°
30
71°
51°
31
70°
51°
1
74°
53°
2
78°
55°
3
79°
53°
4
69°
47°
5
67°
46°
6
67°
47°
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 59° to 79°, with overnight lows between 36° and 55°. The average high for May is 68° with an average low of 45°. 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.
