S
M
T
W
T
F
S
26
85°
71°
27
95°
73°
28
90°
71°
29
66°
57°
30
62°
59°
1
62°
50°
2
78°
46°
3
82°
48°
4
85°
58°
5
93°
62°
6
65°
51°
7
72°
49°
8
78°
63°
9
89°
67°
10
87°
59°
11
81°
57°
12
88°
63°
13
89°
63°
14
90°
67°
15
87°
68°
16
83°
69°
17
85°
69°
18
85°
68°
19
84°
67°
20
88°
68°
21
86°
62°
22
85°
66°
23
79°
66°
24
80°
65°
25
80°
66°
26
81°
66°
27
81°
65°
28
82°
66°
29
81°
66°
30
82°
63°
31
82°
64°
1
83°
64°
2
83°
65°
3
84°
68°
4
83°
69°
5
84°
69°
6
86°
70°
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 78° to 90°, with overnight lows between 57° and 70°. The average high for May is 84° with an average low of 66°. 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.
