Austin Weather in September

The climate in Austin during September can be summarized as mild and a little damp.

September is in the fall / autumn in Austin and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 22°C (72°F), whilst at night 9°C (49°F) is normal.

On average September is the 5th wettest month of the year in Austin with around 89mm 3.5 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 10 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.1 hours of sunshine per day.

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Austin in September 2024.