S
M
T
W
T
F
S
30
96°
75°
31
97°
75°
1
98°
74°
2
99°
78°
3
100°
78°
4
93°
77°
5
98°
76°
6
95°
76°
7
98°
76°
8
99°
77°
9
98°
76°
10
99°
75°
11
100°
76°
12
98°
76°
13
98°
77°
14
97°
77°
15
99°
76°
16
97°
76°
17
97°
74°
18
96°
71°
19
95°
74°
20
96°
72°
21
95°
71°
22
96°
74°
23
94°
73°
24
94°
72°
25
96°
74°
26
92°
73°
27
99°
73°
28
97°
75°
29
92°
75°
30
95°
75°
1
83°
68°
2
77°
61°
3
80°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lakeway
Lakeway's September 2026 forecast shows daily high temperatures ranging from 77° to 99°, with overnight lows between 61° and 75°. The average high for September is 89° 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 Lakeway. See also: October | November | December.
