Bexar County (San Antonio)
September
Weather in Bexar County for September 2025
Your guide to Bexar County weather in September - trends and predictions
In general, the average temperature in Bexar County at the beginning of September is 36.3 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 35.4 °F by the end of September.
With an average of 4 rainy days, Bexar County experiences minimal rainfall in September.
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26
Dry days
4
Rainy days
0
Snow days
38°/24°
Temperatures
21 km/h
Avg max wind
55 %
Avg humidity
Bexar County in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  37° | 2 36° | 3  35° | 4  35° | 5  37° | 6 37° | 7  37° |
| 8 37° | 9 37° | 10 37° | 11 36° | 12 35° | 13 34° | 14 37° |
| 15  35° | 16  36° | 17 38° | 18 36° | 19 36° | 20 38° | 21 35° |
| 22 37° | 23 37° | 24 37° | 25 34° | 26 34° | 27 35° | 28 37° |
| 29 35° | 30 36° |
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Temperatures trend during September in Bexar County
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 | Partly cloudy | 36° /23° | 1.1 mm | 9 | |
| Sept. 3 | Sunny | 35° /23° | 10.9 mm | 8 | |
| Sept. 4 | Overcast | 35° /22° | 0.8 mm | 8 | |
| Sept. 5 | Cloudy | 37° /23° | 0 mm | 9 | |
| Sept. 6 | Overcast | 37° /24° | 0 mm | 9 | |
| Sept. 7 | Mist | 37° /23° | 0 mm | 9 | |
| Sept. 8 | Sunny | 37° /22° | 0 mm | 9 | |
| Sept. 9 | Partly cloudy | 37° /21° | 0 mm | 9 | |
| Sept. 10 | Sunny | 37° /22° | 0.6 mm | 9 | |
| Sept. 11 | Overcast | 36° /23° | 0 mm | 8 | |
| Sept. 12 | Overcast | 35° /23° | 0 mm | 8 | |
| Sept. 13 | Overcast | 34° /24° | 0 mm | 8 | |
| Sept. 14 | Overcast | 37° /23° | 0 mm | 8 | |
| Sept. 15 | Thundery outbreaks possible | 35° /24° | 0 mm | 8 | |
| Sept. 16 | Light rain shower | 36° /21° | 5.1 mm | 8 | |
| Sept. 17 | Patchy rain possible | 38° /23° | 0.1 mm | 9 | |
| Sept. 18 | Partly cloudy | 36° /24° | 0 mm | 9 | |
| Sept. 19 | Overcast | 36° /24° | 0 mm | 8 | |
| Sept. 20 | Partly cloudy | 38° /23° | 0 mm | 9 | |
| Sept. 21 | Cloudy | 35° /23° | 0 mm | 8 | |
| Sept. 22 | Patchy rain possible | 37° /23° | 0 mm | 8 | |
| Sept. 23 | Thundery outbreaks possible | 37° /24° | 0 mm | 8 | |
| Sept. 24 | Thundery outbreaks possible | 37° /24° | 2.3 mm | 8 | |
| Sept. 25 | Overcast | 34° /23° | 9.1 mm | 8 | |
| Sept. 26 | Cloudy | 34° /22° | 0 mm | 8 | |
| Sept. 27 | Overcast | 35° /21° | 0 mm | 9 | |
| Sept. 28 | Partly cloudy | 37° /22° | 0 mm | 9 | |
| Sept. 29 | Overcast | 35° /21° | 0 mm | 8 | |
| Sept. 30 | Light rain shower | 36° /21° | 0.3 mm | 8 | |
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Important Notice
Our weather forecast for Bexar County 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 Bexar County forecast closer to your planned date for the most up-to-date weather information.
Bexar County in September - FAQ
What are the expected maximum and minimum temperatures in Bexar County during September?
With daytime temperatures soaring above 38° and not dropping much below 24° at night, September in Bexar County is quite hot. Staying hydrated and avoiding peak sun hours is advisable.
How much rainfall should be expected in Bexar County during September?
Expect minimal rainfall in Bexar County during September, with a total of 15.7 mm over approximately 4 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Bexar County during September?
The average wind speed in Bexar County during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Bexar County
Explore the daily rainfall trends and prepare for Bexar Countys September weather 💧
UV exposure in Bexar County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Bexar County?Get accurate weather forecasts for Bexar County, located at latitude 29.424 and longitude -98.494. Stay updated with localized weather information tailored for Bexar County.
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