S
M
T
W
T
F
S
26
101°
77°
27
100°
76°
28
89°
76°
29
99°
76°
30
94°
77°
31
98°
72°
1
88°
65°
2
90°
64°
3
92°
67°
4
98°
72°
5
98°
73°
6
96°
69°
7
91°
72°
8
97°
72°
9
99°
74°
10
98°
76°
11
101°
76°
12
100°
74°
13
98°
74°
14
99°
72°
15
103°
77°
16
94°
72°
17
96°
74°
18
96°
74°
19
95°
73°
20
95°
73°
21
96°
74°
22
96°
73°
23
95°
73°
24
95°
74°
25
96°
73°
26
94°
72°
27
94°
72°
28
95°
73°
29
95°
72°
30
94°
71°
31
94°
71°
1
93°
70°
2
93°
71°
3
92°
71°
4
93°
70°
5
92°
70°
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 90° to 103°, with overnight lows between 64° and 77°. The average high for August is 96° with an average low of 72°. 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.
