S
M
T
W
T
F
S
30
88°
66°
31
89°
71°
1
90°
70°
2
87°
64°
3
85°
62°
4
83°
61°
5
84°
62°
6
85°
65°
7
86°
66°
8
86°
68°
9
89°
68°
10
87°
62°
11
87°
61°
12
84°
68°
13
86°
60°
14
85°
59°
15
82°
58°
16
83°
59°
17
82°
58°
18
83°
59°
19
85°
59°
20
85°
61°
21
87°
64°
22
87°
64°
23
79°
63°
24
82°
63°
25
80°
61°
26
85°
61°
27
86°
60°
28
85°
61°
29
85°
62°
30
84°
61°
1
85°
61°
2
86°
56°
3
85°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Westwood
Westwood's September 2026 forecast shows daily high temperatures ranging from 79° to 90°, with overnight lows between 53° and 71°. The average high for September is 85° with an average low of 62°. 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 Westwood. See also: October | November | December.