S
M
T
W
T
F
S
30
81°
61°
31
81°
64°
1
72°
61°
2
75°
63°
3
84°
66°
4
84°
66°
5
82°
61°
6
73°
57°
7
82°
54°
8
82°
59°
9
81°
61°
10
86°
68°
11
79°
57°
12
77°
54°
13
77°
64°
14
75°
54°
15
73°
50°
16
75°
54°
17
82°
63°
18
82°
63°
19
72°
57°
20
64°
57°
21
72°
57°
22
68°
50°
23
68°
48°
24
66°
46°
25
64°
48°
26
59°
55°
27
64°
57°
28
61°
55°
29
70°
55°
30
66°
57°
1
71°
63°
2
78°
59°
3
72°
50°
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 71° to 78°, with overnight lows between 50° and 63°. The average high for September is 74° with an average low of 57°. 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.
