S
M
T
W
T
F
S
26
78°
56°
27
84°
58°
28
59°
49°
29
65°
44°
30
65°
41°
1
69°
46°
2
68°
44°
3
83°
41°
4
83°
60°
5
63°
46°
6
63°
42°
7
72°
40°
8
79°
51°
9
84°
48°
10
67°
46°
11
79°
40°
12
82°
48°
13
82°
53°
14
84°
51°
15
86°
70°
16
87°
72°
17
87°
69°
18
88°
76°
19
79°
54°
20
60°
54°
21
65°
58°
22
77°
63°
23
75°
57°
24
82°
54°
25
85°
55°
26
84°
59°
27
85°
64°
28
80°
70°
29
86°
68°
30
90°
68°
31
91°
68°
1
92°
70°
2
86°
68°
3
83°
67°
4
86°
66°
5
87°
72°
6
75°
70°
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 ° to °, with overnight lows between ° and °. The average high for May is ° with an average low of °. 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.
