S
M
T
W
T
F
S
30
82°
68°
31
85°
72°
1
88°
72°
2
88°
71°
3
87°
67°
4
87°
63°
5
80°
64°
6
81°
68°
7
84°
69°
8
84°
69°
9
85°
70°
10
80°
69°
11
85°
70°
12
85°
70°
13
84°
69°
14
84°
70°
15
86°
70°
16
85°
69°
17
84°
69°
18
83°
62°
19
82°
61°
20
78°
59°
21
74°
58°
22
75°
63°
23
77°
61°
24
80°
58°
25
74°
57°
26
75°
58°
27
74°
57°
28
79°
62°
29
78°
63°
30
79°
62°
1
78°
63°
2
77°
61°
3
77°
62°
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 74° to 88°, with overnight lows between 57° and 72°. The average high for September is 81° with an average low of 65°. 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.
