S
M
T
W
T
F
S
30
79°
56°
31
76°
53°
1
72°
53°
2
66°
60°
3
66°
61°
4
80°
63°
5
75°
58°
6
74°
53°
7
82°
50°
8
79°
57°
9
67°
51°
10
85°
65°
11
76°
50°
12
70°
43°
13
64°
59°
14
71°
51°
15
67°
44°
16
71°
54°
17
74°
56°
18
78°
45°
19
65°
45°
20
61°
50°
21
68°
47°
22
61°
47°
23
61°
46°
24
62°
50°
25
64°
50°
26
67°
48°
27
66°
47°
28
65°
48°
29
66°
50°
30
65°
49°
1
67°
41°
2
68°
48°
3
61°
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 61° to 78°, with overnight lows between 41° and 50°. The average high for September is 65° with an average low of 48°. 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.
