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United StatesThe weather in September in Austin
It's hot in September in Austin with an average temperature of 34°C. Temperatures this month range from a low of 31°C to a high of 36°C. At night, you can expect temperatures between 20°C and 25°C.
September is a good month to be in Austin for sunny weather. You’ll have high temperatures and not too much rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Austin, Texas. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 42°C in 2023, Austin reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 19°C in 2020. The extreme nighttime temperatures ranged from a lowest recorded value of 11°C to a highest value of 29°C.
Rainfall amount
In September, there is an average of 74 mm of precipitation, spread over 10 days. The wind speed is around 3 Bft, mostly coming from the Southeast.
Daily weather in September for Austin
Click on any day in September to get detailed info about the usual weather on that day in Austin. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Austin | New York | |
|---|---|---|
| Average temperature | 34°C | 27°C |
| Max. temperature | 36°C | 31°C |
| Min. temperature | 20°C | -5°C |
| Total precipitation | 74 mm | 57 mm |
| Rainy days | 10 days | 9 days |
Start of September
The month of September starts in Austin with hot temps, averaging around 35°C during the day and nights around 24°C.
Mid September
By mid-September, daytime temps drop to around 34°C, with nights around 23°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of September
By the end of September, the average daytime temperature in Austin is around 33°C, while nighttime temps are about 22°C. A shower might pop up, but overall, the weather will be dry and sunny.
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UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
The hurricane season in Austin runs from June to November.
Check out the climate of Austin for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in September in Austin, Texas. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Austin
Temperature in September in Austin over the years
Precipitation charts
These charts show the average amount of precipitation in September in Austin, Texas. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in Austin
Total precipitation in September in Austin over the years
Daily UV index in September in Austin
This chart shows the average daily UV index in September in Austin, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in September in Austin
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Average weather in Austin by month
Click on a month below to see detailed weather info for Austin. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.