S
M
T
W
T
F
S
26
57°
38°
27
70°
34°
28
57°
45°
29
59°
53°
30
65°
40°
1
65°
33°
2
58°
42°
3
61°
37°
4
73°
34°
5
82°
61°
6
71°
53°
7
65°
48°
8
67°
37°
9
64°
45°
10
72°
44°
11
62°
43°
12
68°
34°
13
72°
51°
14
58°
50°
15
69°
49°
16
81°
43°
17
85°
54°
18
93°
58°
19
92°
65°
20
89°
63°
21
67°
52°
22
63°
52°
23
52°
49°
24
63°
58°
25
75°
59°
26
79°
61°
27
78°
60°
28
79°
52°
29
80°
50°
30
73°
47°
31
69°
51°
1
73°
52°
2
74°
51°
3
78°
58°
4
78°
60°
5
80°
58°
6
79°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Dover
Dover's May 2026 forecast shows daily high temperatures ranging from 63° to 80°, with overnight lows between 47° and 62°. The average high for May is 76° with an average low of 56°. 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 Dover. See also: June | July | August.
