S
M
T
W
T
F
S
30
80°
54°
31
79°
49°
1
75°
49°
2
72°
50°
3
72°
49°
4
73°
49°
5
71°
50°
6
71°
48°
7
72°
48°
8
73°
49°
9
71°
52°
10
70°
50°
11
70°
53°
12
75°
52°
13
73°
51°
14
74°
49°
15
68°
47°
16
69°
47°
17
66°
46°
18
67°
50°
19
67°
45°
20
72°
52°
21
70°
51°
22
Hist. Avg.
68°
47°
23
Hist. Avg.
68°
46°
24
Hist. Avg.
68°
46°
25
Hist. Avg.
67°
46°
26
Hist. Avg.
67°
45°
27
Hist. Avg.
66°
45°
28
Hist. Avg.
66°
45°
29
Hist. Avg.
66°
44°
30
Hist. Avg.
65°
44°
1
Hist. Avg.
65°
43°
2
Hist. Avg.
64°
43°
3
Hist. Avg.
64°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Westport
Westport's September 2026 forecast shows daily high temperatures ranging from 66° to 80°, with overnight lows between 45° and 54°. The average high for September is 72° 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.
