S
M
T
W
T
F
S
30
93°
71°
31
95°
73°
1
96°
72°
2
95°
72°
3
95°
73°
4
96°
75°
5
96°
74°
6
95°
74°
7
95°
73°
8
94°
74°
9
93°
72°
10
93°
72°
11
92°
71°
12
92°
72°
13
91°
72°
14
90°
71°
15
92°
71°
16
90°
70°
17
89°
70°
18
88°
69°
19
90°
69°
20
86°
68°
21
87°
68°
22
88°
67°
23
87°
68°
24
90°
68°
25
89°
66°
26
89°
66°
27
90°
65°
28
89°
66°
29
88°
65°
30
87°
65°
1
86°
64°
2
88°
65°
3
89°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Westlake
Westlake's September 2026 forecast shows daily high temperatures ranging from 86° to 96°, with overnight lows between 64° and 75°. The average high for September is 91° with an average low of 70°. 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 Westlake. See also: October | November | December.
