S
M
T
W
T
F
S
30
80°
58°
31
81°
54°
1
81°
49°
2
74°
48°
3
73°
50°
4
77°
56°
5
79°
58°
6
80°
49°
7
75°
49°
8
74°
51°
9
76°
55°
10
70°
56°
11
75°
54°
12
76°
54°
13
74°
53°
14
68°
47°
15
68°
45°
16
69°
43°
17
68°
50°
18
69°
46°
19
68°
52°
20
72°
53°
21
73°
48°
22
67°
42°
23
66°
47°
24
65°
49°
25
64°
42°
26
64°
41°
27
Hist. Avg.
68°
44°
28
Hist. Avg.
68°
44°
29
Hist. Avg.
67°
44°
30
Hist. Avg.
67°
43°
1
Hist. Avg.
66°
43°
2
Hist. Avg.
66°
42°
3
Hist. Avg.
65°
42°
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 64° to 81°, with overnight lows between 41° and 58°. 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.
