S
M
T
W
T
F
S
26
63°
50°
27
71°
49°
28
62°
52°
29
71°
55°
30
71°
53°
1
67°
52°
2
61°
42°
3
69°
44°
4
75°
56°
5
81°
58°
6
79°
64°
7
71°
48°
8
66°
47°
9
72°
54°
10
73°
55°
11
76°
59°
12
74°
58°
13
73°
58°
14
74°
55°
15
78°
61°
16
79°
60°
17
76°
61°
18
76°
62°
19
80°
62°
20
81°
61°
21
81°
62°
22
82°
63°
23
83°
63°
24
83°
62°
25
81°
63°
26
79°
64°
27
82°
63°
28
80°
64°
29
80°
64°
30
82°
63°
31
82°
64°
1
83°
65°
2
84°
65°
3
85°
63°
4
76°
60°
5
75°
59°
6
76°
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 61° to 85°, with overnight lows between 42° and 65°. 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.
