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
81°
69°
12
80°
67°
13
87°
61°
14
83°
67°
15
91°
69°
16
88°
68°
17
82°
63°
18
76°
56°
19
74°
54°
20
72°
51°
21
72°
52°
22
76°
55°
23
78°
56°
24
75°
52°
25
79°
58°
26
80°
57°
27
79°
57°
28
79°
56°
29
78°
57°
30
78°
56°
1
76°
54°
2
73°
55°
3
77°
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 51° and 69°. The average high for September is 79° with an average low of 59°. 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.
