S
M
T
W
T
F
S
30
62°
47°
31
64°
54°
1
68°
55°
2
71°
51°
3
73°
54°
4
70°
47°
5
63°
47°
6
64°
52°
7
65°
51°
8
64°
49°
9
63°
51°
10
62°
53°
11
63°
52°
12
62°
48°
13
62°
50°
14
64°
52°
15
70°
52°
16
70°
46°
17
65°
45°
18
64°
45°
19
69°
48°
20
69°
52°
21
66°
47°
22
62°
45°
23
61°
45°
24
62°
44°
25
61°
43°
26
63°
43°
27
62°
51°
28
61°
50°
29
62°
47°
30
62°
48°
1
67°
50°
2
64°
49°
3
65°
47°
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 61° to 73°, with overnight lows between 43° and 55°. The average high for September is 65° with an average low of 49°. 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.
