S
M
T
W
T
F
S
30
76°
61°
31
78°
64°
1
78°
56°
2
79°
57°
3
71°
56°
4
72°
58°
5
74°
63°
6
76°
60°
7
78°
56°
8
71°
60°
9
71°
62°
10
73°
62°
11
76°
61°
12
75°
60°
13
69°
60°
14
69°
55°
15
72°
54°
16
69°
53°
17
68°
57°
18
69°
57°
19
73°
58°
20
68°
60°
21
72°
58°
22
71°
51°
23
69°
56°
24
66°
59°
25
71°
55°
26
64°
53°
27
67°
56°
28
Hist. Avg.
67°
55°
29
Hist. Avg.
66°
55°
30
Hist. Avg.
66°
54°
1
Hist. Avg.
66°
54°
2
Hist. Avg.
66°
54°
3
Hist. Avg.
65°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Dennis Port
Dennis Port's September 2026 forecast shows daily high temperatures ranging from 64° to 79°, with overnight lows between 51° and 64°. The average high for September is 72° 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 September weather will actually feel in Dennis Port. See also: October | November | December.
