S
M
T
W
T
F
S
30
80°
62°
31
83°
64°
1
86°
63°
2
85°
63°
3
85°
59°
4
79°
56°
5
78°
62°
6
84°
62°
7
83°
61°
8
84°
62°
9
80°
60°
10
77°
61°
11
83°
62°
12
84°
61°
13
82°
61°
14
83°
60°
15
83°
60°
16
82°
60°
17
81°
57°
18
81°
52°
19
74°
50°
20
74°
49°
21
72°
49°
22
73°
50°
23
74°
50°
24
77°
49°
25
73°
54°
26
77°
56°
27
75°
54°
28
76°
54°
29
75°
53°
30
77°
53°
1
74°
51°
2
75°
52°
3
71°
51°
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 71° to 86°, with overnight lows between 49° and 64°. The average high for September is 79° 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 Westwood. See also: October | November | December.