S
M
T
W
T
F
S
26
62°
46°
27
76°
44°
28
72°
55°
29
60°
46°
30
57°
41°
1
51°
37°
2
49°
32°
3
61°
32°
4
74°
46°
5
71°
48°
6
58°
43°
7
59°
40°
8
65°
42°
9
72°
53°
10
65°
49°
11
69°
39°
12
71°
42°
13
67°
46°
14
65°
44°
15
69°
38°
16
77°
55°
17
85°
60°
18
88°
68°
19
88°
61°
20
67°
43°
21
70°
50°
22
64°
60°
23
73°
61°
24
75°
59°
25
78°
60°
26
77°
61°
27
76°
59°
28
77°
58°
29
78°
57°
30
81°
61°
31
81°
61°
1
77°
55°
2
79°
58°
3
78°
57°
4
72°
56°
5
73°
54°
6
76°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Delaware
Delaware's May 2026 forecast shows daily high temperatures ranging from 64° to 88°, with overnight lows between 43° and 61°. The average high for May is 76° with an average low of 57°. 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 Delaware. See also: June | July | August.
