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
70°
55°
22
65°
50°
23
67°
51°
24
67°
51°
25
65°
57°
26
65°
59°
27
66°
55°
28
69°
56°
29
67°
55°
30
68°
56°
1
70°
54°
2
69°
53°
3
65°
58°
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 65° to 70°, with overnight lows between 50° and 59°. The average high for September is 67° with an average low of 55°. 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.
