S
M
T
W
T
F
S
26
58°
43°
27
71°
38°
28
60°
49°
29
61°
53°
30
67°
42°
1
68°
37°
2
59°
38°
3
60°
42°
4
73°
54°
5
82°
62°
6
74°
61°
7
68°
42°
8
65°
42°
9
64°
45°
10
69°
49°
11
68°
49°
12
66°
46°
13
70°
52°
14
72°
53°
15
76°
52°
16
78°
55°
17
77°
56°
18
79°
56°
19
79°
55°
20
78°
57°
21
79°
56°
22
75°
49°
23
70°
48°
24
70°
49°
25
72°
51°
26
73°
51°
27
72°
50°
28
72°
52°
29
73°
51°
30
73°
56°
31
76°
59°
1
79°
59°
2
75°
56°
3
75°
57°
4
80°
60°
5
80°
60°
6
83°
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 59° to 83°, with overnight lows between 38° and 62°. The average high for May is 73° 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.
