S
M
T
W
T
F
S
26
61°
50°
27
65°
40°
28
73°
37°
29
74°
47°
30
73°
54°
1
69°
42°
2
58°
45°
3
64°
41°
4
80°
44°
5
83°
57°
6
79°
60°
7
67°
48°
8
70°
42°
9
77°
49°
10
84°
55°
11
65°
40°
12
73°
36°
13
77°
47°
14
70°
51°
15
74°
49°
16
84°
61°
17
92°
63°
18
93°
63°
19
91°
62°
20
91°
64°
21
75°
53°
22
70°
52°
23
74°
55°
24
77°
54°
25
81°
58°
26
82°
59°
27
82°
60°
28
83°
58°
29
80°
62°
30
84°
62°
31
83°
61°
1
78°
61°
2
79°
60°
3
79°
58°
4
78°
57°
5
79°
63°
6
86°
65°
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 70° to 93°, with overnight lows between 49° and 65°. The average high for May is 82° with an average low of 59°. 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.
