The weather in Austin in September is hot. The average temperatures are between 22°C and 32°C.
You can expect about 3 to 8 days of rain in Austin during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Austin in September 2025.
If you’re planning to visit Austin in the near future, we highly recommend that you review the 14 day weather forecast for Austin before you arrive.
Temperatures
32° / 22°
Rainy Days
7
Snowy Days
0
Dry Days
23
Rainfall
140
mm
Sun Hours
10.8
Hrs
