S
M
T
W
T
F
S
30
83°
54°
31
77°
62°
1
70°
62°
2
75°
63°
3
75°
65°
4
83°
61°
5
77°
57°
6
74°
57°
7
80°
61°
8
78°
59°
9
75°
58°
10
75°
62°
11
76°
60°
12
75°
61°
13
78°
58°
14
76°
57°
15
72°
59°
16
74°
61°
17
77°
60°
18
71°
56°
19
71°
58°
20
72°
59°
21
76°
60°
22
78°
61°
23
78°
60°
24
77°
59°
25
76°
58°
26
77°
58°
27
76°
59°
28
76°
58°
29
75°
56°
30
68°
52°
1
65°
53°
2
65°
56°
3
72°
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 65° to 83°, with overnight lows between 52° and 65°. The average high for September is 75° 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.
