S
M
T
W
T
F
S
30
70°
61°
31
76°
52°
1
74°
58°
2
71°
64°
3
80°
61°
4
76°
56°
5
70°
58°
6
69°
50°
7
75°
46°
8
72°
51°
9
72°
53°
10
80°
60°
11
69°
47°
12
75°
42°
13
72°
62°
14
68°
44°
15
69°
57°
16
75°
60°
17
71°
57°
18
70°
46°
19
66°
52°
20
64°
50°
21
61°
47°
22
59°
46°
23
61°
49°
24
68°
50°
25
67°
51°
26
62°
50°
27
63°
50°
28
72°
49°
29
68°
45°
30
62°
41°
1
65°
48°
2
66°
48°
3
66°
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 59° to 75°, with overnight lows between 41° and 60°. The average high for September is 66° 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.
