S
M
T
W
T
F
S
30
80°
68°
31
80°
67°
1
79°
63°
2
73°
60°
3
72°
62°
4
73°
61°
5
73°
59°
6
74°
66°
7
78°
66°
8
75°
65°
9
73°
65°
10
75°
66°
11
79°
65°
12
78°
66°
13
79°
66°
14
78°
56°
15
72°
56°
16
68°
57°
17
71°
56°
18
77°
62°
19
78°
63°
20
78°
62°
21
77°
57°
22
76°
53°
23
68°
54°
24
67°
53°
25
68°
61°
26
73°
61°
27
74°
60°
28
73°
59°
29
73°
59°
30
74°
58°
1
74°
60°
2
73°
53°
3
73°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Westbrook
Westbrook's September 2026 forecast shows daily high temperatures ranging from 67° to 80°, with overnight lows between 51° and 68°. The average high for September is 74° with an average low of 60°. 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 Westbrook. See also: October | November | December.
