S
M
T
W
T
F
S
30
82°
63°
31
77°
63°
1
79°
62°
2
83°
59°
3
82°
54°
4
74°
55°
5
74°
62°
6
80°
58°
7
79°
54°
8
73°
56°
9
72°
58°
10
74°
61°
11
76°
60°
12
81°
61°
13
80°
60°
14
81°
55°
15
79°
53°
16
71°
54°
17
71°
50°
18
72°
50°
19
70°
47°
20
69°
47°
21
68°
49°
22
69°
56°
23
70°
48°
24
71°
54°
25
74°
56°
26
71°
55°
27
76°
56°
28
76°
52°
29
75°
50°
30
69°
50°
1
68°
51°
2
73°
52°
3
66°
44°
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 66° to 83°, with overnight lows between 44° and 63°. The average high for September is 74° 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 Westlake. See also: October | November | December.
