S
M
T
W
T
F
S
30
90°
61°
31
91°
68°
1
93°
66°
2
95°
72°
3
95°
72°
4
95°
72°
5
93°
72°
6
82°
66°
7
82°
57°
8
90°
61°
9
93°
72°
10
79°
68°
11
82°
64°
12
82°
68°
13
84°
56°
14
77°
62°
15
91°
69°
16
91°
68°
17
89°
67°
18
85°
66°
19
81°
60°
20
72°
55°
21
75°
56°
22
74°
55°
23
76°
54°
24
75°
52°
25
75°
52°
26
80°
57°
27
79°
57°
28
79°
58°
29
78°
58°
30
78°
57°
1
77°
57°
2
77°
56°
3
76°
56°
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 72° to 91°, with overnight lows between 52° and 69°. The average high for September is 79° with an average low of 58°. 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.
