S
M
T
W
T
F
S
26
69°
42°
27
70°
51°
28
62°
47°
29
55°
42°
30
53°
38°
1
51°
35°
2
58°
34°
3
71°
46°
4
80°
46°
5
56°
42°
6
53°
38°
7
62°
33°
8
69°
41°
9
69°
49°
10
64°
41°
11
63°
36°
12
76°
41°
13
65°
46°
14
71°
44°
15
81°
55°
16
82°
60°
17
82°
64°
18
79°
66°
19
72°
47°
20
63°
44°
21
61°
47°
22
64°
52°
23
72°
52°
24
80°
55°
25
79°
57°
26
81°
56°
27
78°
55°
28
77°
56°
29
76°
55°
30
78°
56°
31
75°
52°
1
78°
57°
2
78°
57°
3
70°
53°
4
70°
52°
5
73°
58°
6
78°
59°
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 81°, with overnight lows between 44° and 66°. The average high for May is 74° with an average low of 54°. 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.
