S
M
T
W
T
F
S
26
63°
36°
27
65°
43°
28
65°
45°
29
71°
45°
30
76°
43°
1
81°
47°
2
85°
53°
3
84°
50°
4
83°
55°
5
80°
59°
6
82°
56°
7
76°
54°
8
76°
51°
9
76°
51°
10
74°
50°
11
76°
45°
12
81°
48°
13
69°
52°
14
67°
49°
15
60°
47°
16
58°
45°
17
63°
42°
18
70°
43°
19
73°
50°
20
73°
51°
21
77°
46°
22
82°
48°
23
82°
56°
24
79°
54°
25
83°
45°
26
62°
47°
27
70°
50°
28
75°
53°
29
76°
48°
30
70°
43°
31
75°
50°
1
79°
52°
2
84°
54°
3
84°
53°
4
83°
52°
5
74°
48°
6
76°
52°
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 62° to 84°, with overnight lows between 43° and 56°. The average high for May is 77° with an average low of 50°. 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.
