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