S
M
T
W
T
F
S
30
95°
71°
31
95°
72°
1
94°
71°
2
93°
69°
3
93°
68°
4
94°
69°
5
95°
71°
6
96°
71°
7
95°
73°
8
96°
72°
9
95°
71°
10
96°
68°
11
94°
67°
12
94°
67°
13
91°
65°
14
89°
64°
15
88°
63°
16
88°
64°
17
91°
63°
18
91°
64°
19
92°
64°
20
Hist. Avg.
90°
69°
21
Hist. Avg.
90°
69°
22
Hist. Avg.
90°
68°
23
Hist. Avg.
90°
68°
24
Hist. Avg.
89°
68°
25
Hist. Avg.
89°
68°
26
Hist. Avg.
89°
67°
27
Hist. Avg.
88°
67°
28
Hist. Avg.
88°
67°
29
Hist. Avg.
88°
66°
30
Hist. Avg.
88°
66°
1
Hist. Avg.
87°
66°
2
Hist. Avg.
87°
66°
3
Hist. Avg.
87°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Austin
Austin's September 2026 forecast shows daily high temperatures ranging from 88° to 96°, with overnight lows between 63° and 73°. The average high for September is 93° with an average low of 68°. 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 Austin. See also: October | November | December.
