S
M
T
W
T
F
S
30
79°
62°
31
79°
64°
1
80°
64°
2
80°
63°
3
79°
56°
4
78°
54°
5
77°
55°
6
77°
55°
7
80°
56°
8
83°
60°
9
83°
62°
10
81°
54°
11
76°
53°
12
76°
57°
13
77°
52°
14
75°
52°
15
74°
53°
16
73°
51°
17
74°
52°
18
75°
53°
19
77°
51°
20
75°
55°
21
79°
55°
22
76°
58°
23
80°
57°
24
77°
57°
25
76°
56°
26
76°
57°
27
75°
56°
28
80°
56°
29
79°
54°
30
77°
54°
1
78°
56°
2
79°
50°
3
79°
44°
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 73° to 83°, with overnight lows between 44° and 64°. The average high for September is 78° with an average low of 56°. 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.
