S
M
T
W
T
F
S
26
82°
67°
27
83°
65°
28
79°
68°
29
78°
67°
30
77°
67°
31
77°
68°
1
78°
68°
2
77°
67°
3
78°
68°
4
79°
68°
5
80°
67°
6
77°
67°
7
78°
66°
8
77°
66°
9
76°
67°
10
76°
67°
11
77°
64°
12
76°
66°
13
76°
67°
14
78°
67°
15
76°
66°
16
75°
65°
17
75°
66°
18
76°
66°
19
76°
67°
20
79°
67°
21
79°
66°
22
80°
65°
23
76°
66°
24
82°
65°
25
81°
64°
26
80°
63°
27
81°
58°
28
74°
57°
29
73°
58°
30
72°
56°
31
71°
55°
1
72°
58°
2
72°
61°
3
73°
64°
4
80°
64°
5
80°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Dennis
Dennis's August 2026 forecast shows daily high temperatures ranging from 71° to 83°, with overnight lows between 55° and 68°. The average high for August is 77° with an average low of 65°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Dennis. See also: September | October | November.
