S
M
T
W
T
F
S
26
63°
50°
27
71°
49°
28
62°
52°
29
71°
55°
30
71°
53°
1
67°
48°
2
62°
42°
3
65°
39°
4
76°
39°
5
77°
52°
6
72°
62°
7
65°
44°
8
71°
51°
9
78°
55°
10
79°
59°
11
69°
44°
12
68°
48°
13
73°
53°
14
74°
54°
15
79°
62°
16
78°
61°
17
78°
61°
18
82°
64°
19
80°
64°
20
81°
57°
21
80°
59°
22
73°
56°
23
74°
59°
24
74°
59°
25
75°
62°
26
76°
62°
27
80°
60°
28
82°
60°
29
83°
63°
30
80°
64°
31
79°
64°
1
76°
63°
2
80°
64°
3
81°
64°
4
78°
65°
5
79°
66°
6
80°
65°
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 65° to 83°, with overnight lows between 44° and 66°. The average high for May is 77° 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 Dennis. See also: June | July | August.
