S
M
T
W
T
F
S
30
76°
46°
31
72°
47°
1
69°
43°
2
70°
48°
3
71°
47°
4
77°
45°
5
76°
52°
6
72°
48°
7
68°
43°
8
67°
42°
9
68°
43°
10
67°
43°
11
68°
47°
12
73°
48°
13
76°
46°
14
76°
49°
15
75°
50°
16
71°
51°
17
75°
49°
18
67°
49°
19
71°
51°
20
75°
50°
21
76°
51°
22
75°
49°
23
66°
50°
24
66°
41°
25
65°
42°
26
65°
49°
27
64°
41°
28
64°
40°
29
65°
43°
30
65°
46°
1
66°
48°
2
72°
47°
3
72°
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 64° to 77°, with overnight lows between 40° and 52°. The average high for September is 70° with an average low of 47°. 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.
