Austin
September
Weather in Austin for September 2025
Your guide to Austin weather in September - trends and predictions
In general, the average temperature in Austin at the beginning of September is 36.4 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 35.1 °F by the end of September.
Austin sees moderate rainfall in September, averaging 7 rainy days.
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23
Dry days
7
Rainy days
0
Snow days
37°/24°
Temperatures
22 km/h
Avg max wind
52 %
Avg humidity
Austin in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  37° | 2  37° | 3 36° | 4  35° | 5 35° | 6  37° | 7 38° |
| 8 38° | 9 36° | 10 37° | 11 35° | 12  35° | 13 35° | 14  37° |
| 15 35° | 16 35° | 17 36° | 18 36° | 19 37° | 20 37° | 21 36° |
| 22 36° | 23 35° | 24 37° | 25  35° | 26 33° | 27 35° | 28 36° |
| 29 36° | 30  34° |
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Temperatures trend during September in Austin
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Partly cloudy | 37° /25° | 0.1 mm | 9 | |
| Sept. 2 | Sunny | 37° /25° | 0 mm | 9 | |
| Sept. 3 | Partly cloudy | 36° /24° | 4.9 mm | 8 | |
| Sept. 4 | Cloudy | 35° /23° | 0.1 mm | 8 | |
| Sept. 5 | Cloudy | 35° /24° | 0 mm | 8 | |
| Sept. 6 | Thundery outbreaks possible | 37° /24° | 0 mm | 9 | |
| Sept. 7 | Partly cloudy | 38° /25° | 0 mm | 9 | |
| Sept. 8 | Sunny | 38° /24° | 0 mm | 9 | |
| Sept. 9 | Partly cloudy | 36° /23° | 0.2 mm | 9 | |
| Sept. 10 | Thundery outbreaks possible | 37° /23° | 0.2 mm | 9 | |
| Sept. 11 | Partly cloudy | 35° /23° | 1.3 mm | 8 | |
| Sept. 12 | Overcast | 35° /24° | 0 mm | 8 | |
| Sept. 13 | Overcast | 35° /24° | 0 mm | 8 | |
| Sept. 14 | Light rain shower | 37° /24° | 1.8 mm | 9 | |
| Sept. 15 | Overcast | 35° /24° | 0 mm | 8 | |
| Sept. 16 | Light rain shower | 35° /23° | 7.5 mm | 8 | |
| Sept. 17 | Cloudy | 36° /23° | 0 mm | 9 | |
| Sept. 18 | Cloudy | 36° /24° | 0 mm | 8 | |
| Sept. 19 | Overcast | 37° /23° | 0 mm | 8 | |
| Sept. 20 | Partly cloudy | 37° /23° | 0 mm | 9 | |
| Sept. 21 | Overcast | 36° /24° | 0 mm | 8 | |
| Sept. 22 | Patchy rain possible | 36° /24° | 0 mm | 8 | |
| Sept. 23 | Thundery outbreaks possible | 35° /25° | 0 mm | 8 | |
| Sept. 24 | Thundery outbreaks possible | 37° /23° | 0.7 mm | 9 | |
| Sept. 25 | Patchy light rain with thunder | 35° /24° | 3.6 mm | 8 | |
| Sept. 26 | Patchy rain possible | 33° /22° | 0 mm | 7 | |
| Sept. 27 | Overcast | 35° /22° | 0 mm | 8 | |
| Sept. 28 | Cloudy | 36° /22° | 0 mm | 9 | |
| Sept. 29 | Overcast | 36° /21° | 0 mm | 9 | |
| Sept. 30 | Light rain | 34° /21° | 1 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.
Austin in September - FAQ
What are the expected maximum and minimum temperatures in Austin during September?
With daytime temperatures soaring above 37° and not dropping much below 24° 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 29.9 mm across approximately 7 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 22 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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