S
M
T
W
T
F
S
26
52°
41°
27
61°
40°
28
52°
39°
29
52°
44°
30
55°
46°
1
59°
45°
2
56°
47°
3
53°
40°
4
62°
48°
5
64°
52°
6
63°
53°
7
60°
48°
8
56°
43°
9
58°
47°
10
59°
46°
11
61°
47°
12
59°
48°
13
58°
51°
14
59°
47°
15
59°
51°
16
60°
49°
17
59°
48°
18
60°
52°
19
61°
51°
20
61°
51°
21
62°
53°
22
67°
49°
23
60°
50°
24
62°
53°
25
64°
51°
26
63°
53°
27
63°
51°
28
62°
53°
29
63°
55°
30
64°
54°
31
64°
53°
1
65°
51°
2
63°
50°
3
64°
52°
4
64°
50°
5
65°
51°
6
64°
53°
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 53° to 67°, with overnight lows between 40° and 55°. The average high for May is 61° with an average low of 50°. 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.
