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
62°
51°
9
71°
50°
10
61°
40°
11
60°
38°
12
59°
51°
13
58°
43°
14
61°
46°
15
68°
49°
16
73°
50°
17
74°
51°
18
78°
53°
19
77°
54°
20
77°
57°
21
80°
51°
22
67°
48°
23
69°
51°
24
69°
50°
25
70°
49°
26
70°
49°
27
72°
48°
28
71°
49°
29
75°
54°
30
78°
57°
31
77°
59°
1
76°
57°
2
77°
53°
3
80°
59°
4
81°
60°
5
81°
61°
6
80°
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 58° to 81°, with overnight lows between 38° and 61°. The average high for May is 72° with an average low of 52°. 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.
