S
M
T
W
T
F
S
30
68°
54°
31
72°
50°
1
65°
58°
2
63°
55°
3
61°
50°
4
64°
53°
5
65°
53°
6
69°
52°
7
66°
53°
8
65°
51°
9
66°
54°
10
69°
53°
11
67°
53°
12
68°
52°
13
68°
50°
14
67°
49°
15
64°
51°
16
62°
50°
17
62°
50°
18
63°
48°
19
61°
52°
20
61°
47°
21
62°
44°
22
60°
45°
23
60°
44°
24
61°
44°
25
61°
45°
26
62°
44°
27
65°
51°
28
61°
50°
29
62°
46°
30
66°
50°
1
62°
50°
2
60°
47°
3
61°
46°
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 60° to 69°, with overnight lows between 44° and 58°. The average high for September is 64° with an average low of 50°. 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.
