S
M
T
W
T
F
S
26
79°
54°
27
82°
55°
28
59°
47°
29
65°
43°
30
67°
40°
1
67°
43°
2
68°
46°
3
82°
58°
4
80°
63°
5
72°
46°
6
55°
40°
7
69°
50°
8
78°
54°
9
81°
56°
10
72°
51°
11
78°
56°
12
75°
55°
13
74°
55°
14
68°
50°
15
78°
60°
16
73°
61°
17
80°
62°
18
81°
62°
19
81°
63°
20
82°
63°
21
81°
62°
22
74°
57°
23
74°
60°
24
77°
63°
25
75°
58°
26
74°
55°
27
74°
56°
28
76°
57°
29
77°
63°
30
84°
65°
31
85°
66°
1
85°
66°
2
84°
67°
3
86°
66°
4
79°
63°
5
79°
61°
6
80°
59°
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 55° to 86°, with overnight lows between 40° and 67°. The average high for May is 77° with an average low of 58°. 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.
