Austin (TX)
September
Weather in Austin, Texas for September 2025
Your guide to Austin weather in September - trends and predictions
Until now, September 2025 in Austin is slightly cooler than the historical average by -1.3 °F.
The forecast for the upcoming days in Austin predicts a temperature of 36.6 °F, which is slightly above the historical average.
In general, the average temperature in Austin at the beginning of September is 35 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 35.6 °F by the end of September.
Austin experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 24.2 mm.
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Temperatures
Rain 🌧️
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22
Dry days
8
Rainy days
0
Snow days
35°/23°
Temperatures
18 km/h
Avg max wind
52 %
Avg humidity
Austin Weather September
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Temperatures trend during September in Austin
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September weather in Austin day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Moderate or heavy rain shower | 36° /25° | 2.2 mm | 8 | |
| Sept. 2 |  Patchy rain possible | 36° /24° | 1.2 mm | 8 | |
| Sept. 3 | Patchy rain possible | 35° /24° | 3.4 mm | 8 | |
| Sept. 4 |  Cloudy | 35° /23° | 0.2 mm | 8 | |
| Sept. 5 | Cloudy | 35° /24° | 0 mm | 8 | |
| Sept. 6 |  Overcast | 34° /24° | 0.7 mm | 8 | |
| Sept. 7 | Cloudy | 34° /24° | 3.9 mm | 8 | |
| Sept. 8 |  Sunny | 37° /23° | 0 mm | 9 | |
| Sept. 9 | Sunny | 36° /22° | 0.1 mm | 9 | |
| Sept. 10 | Sunny | 36° /22° | 0.1 mm | 8 | |
| Sept. 11 | Sunny | 35° /23° | 0.5 mm | 8 | |
| Sept. 12 | Sunny | 35° /23° | 0.1 mm | 8 | |
| Sept. 13 | Sunny | 35° /23° | 0 mm | 2.1 | |
| Sept. 14 |  Partly cloudy | 36° /23° | 0 mm | 1.8 | |
| Sept. 15 | Sunny | 36° /24° | 0 mm | 1.9 | |
| Sept. 16 | Sunny | 36° /23° | 0 mm | 2 | |
| Sept. 17 | Sunny | 36° /24° | 0 mm | 0 | |
| Sept. 18 | Sunny | 36° /23° | 0.1 mm | 7 | |
| Sept. 19 | Sunny | 36° /23° | 0 mm | 7 | |
| Sept. 20 | Sunny | 37° /23° | 0 mm | 7 | |
| Sept. 21 | Sunny | 37° /22° | 0 mm | 7 | |
| Sept. 22 | Patchy rain possible | 38° /23° | 0.3 mm | 6 | |
| Sept. 23 | Sunny | 37° /25° | 0 mm | 8 | |
| Sept. 24 | Sunny | 37° /25° | 0 mm | 8 | |
| Sept. 25 | Sunny | 38° /26° | 0 mm | 8 | |
| Sept. 26 | Sunny | 37° /24° | 0 mm | 7 | |
| Sept. 27 | Overcast | 34° /20° | 0 mm | 8 | |
| Sept. 28 | Sunny | 35° /21° | 0.3 mm | 9 | |
| Sept. 29 | Sunny | 35° /21° | 3 mm | 8 | |
| Sept. 30 | Sunny | 33° /21° | 2.6 mm | 8 | |
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Important Notice
Our weather forecast for Austin in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Austin forecast closer to your planned date for the most up-to-date weather information.
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Austin in September - FAQ
What are the expected maximum and minimum temperatures in Austin during September?
With daytime temperatures soaring above 35° and not dropping much below 23° at night, September in Austin is quite hot. Staying hydrated and avoiding peak sun hours is advisable.
How much rainfall should be expected in Austin during September?
In September, Austin can expect light to moderate rainfall, totaling 24.2 mm across approximately 8 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Austin during September?
The average wind speed in Austin during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Austin
Explore the daily rainfall trends and prepare for Austins September weather 💧
UV exposure in Austin during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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