S
M
T
W
T
F
S
26
52°
41°
27
61°
40°
28
52°
39°
29
52°
44°
30
55°
46°
1
60°
46°
2
55°
43°
3
52°
36°
4
63°
37°
5
64°
54°
6
62°
52°
7
60°
46°
8
62°
42°
9
58°
50°
10
64°
52°
11
62°
49°
12
59°
48°
13
61°
48°
14
64°
50°
15
64°
51°
16
65°
51°
17
63°
50°
18
67°
48°
19
66°
52°
20
61°
52°
21
62°
53°
22
62°
53°
23
63°
52°
24
61°
51°
25
62°
51°
26
63°
54°
27
62°
53°
28
63°
52°
29
64°
50°
30
63°
54°
31
64°
56°
1
67°
56°
2
65°
53°
3
65°
56°
4
68°
57°
5
66°
57°
6
66°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Dennis
Dennis's May 2026 forecast shows daily high temperatures ranging from 58° to 68°, with overnight lows between 42° and 57°. The average high for May is 63° 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 Dennis. See also: June | July | August.
