S
M
T
W
T
F
S
26
61°
41°
27
70°
35°
28
62°
38°
29
61°
48°
30
59°
46°
1
63°
35°
2
57°
43°
3
60°
40°
4
72°
35°
5
82°
53°
6
66°
51°
7
63°
45°
8
61°
38°
9
58°
49°
10
70°
48°
11
62°
46°
12
67°
34°
13
68°
47°
14
65°
46°
15
68°
43°
16
80°
56°
17
87°
55°
18
88°
62°
19
93°
62°
20
84°
56°
21
69°
47°
22
67°
46°
23
69°
48°
24
73°
48°
25
76°
53°
26
77°
57°
27
78°
49°
28
68°
48°
29
68°
50°
30
69°
54°
31
75°
52°
1
69°
50°
2
70°
48°
3
69°
48°
4
70°
49°
5
71°
56°
6
76°
57°
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 65° to 93°, with overnight lows between 43° and 62°. The average high for May is 74° 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.
