S
M
T
W
T
F
S
30
78°
64°
31
82°
64°
1
83°
65°
2
84°
64°
3
83°
57°
4
82°
56°
5
75°
57°
6
76°
62°
7
77°
62°
8
80°
61°
9
81°
62°
10
80°
61°
11
79°
58°
12
80°
56°
13
79°
61°
14
79°
62°
15
80°
62°
16
80°
56°
17
78°
60°
18
75°
59°
19
78°
56°
20
74°
52°
21
70°
51°
22
70°
56°
23
71°
55°
24
75°
50°
25
69°
49°
26
69°
49°
27
68°
55°
28
73°
56°
29
74°
52°
30
72°
51°
1
65°
54°
2
66°
47°
3
66°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Westport
Westport's September 2026 forecast shows daily high temperatures ranging from 65° to 84°, with overnight lows between 47° and 65°. The average high for September is 76° 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 Westport. See also: October | November | December.
