S
M
T
W
T
F
S
30
79°
61°
31
78°
64°
1
77°
62°
2
78°
63°
3
76°
63°
4
77°
62°
5
77°
62°
6
76°
61°
7
76°
62°
8
75°
61°
9
75°
61°
10
74°
60°
11
76°
60°
12
76°
59°
13
75°
60°
14
76°
60°
15
73°
61°
16
75°
59°
17
74°
58°
18
70°
57°
19
72°
51°
20
66°
50°
21
65°
58°
22
67°
51°
23
66°
50°
24
64°
51°
25
66°
56°
26
68°
54°
27
66°
53°
28
64°
51°
29
63°
50°
30
64°
49°
1
66°
54°
2
66°
56°
3
67°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Dennis Port
Dennis Port's September 2026 forecast shows daily high temperatures ranging from 63° to 79°, with overnight lows between 49° and 64°. The average high for September is 72° with an average low of 57°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Dennis Port. See also: October | November | December.
