Bexar County (San Antonio)
September
Weather in Bexar County, Texas for September 2026
Your guide to Bexar County weather in September - trends and predictions
So far, September 2026 in Bexar County is slightly warmer than the historical average by 1.3 °F.
Expect cooler weather in the next days in Bexar County with the forecast suggesting a temperature of 34.6 °F, lower than the historical average.
In general, the average temperature in Bexar County at the beginning of September is 36.3 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 34 °F by the end of September.
With an average of 4 rainy days, Bexar County experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
More
26
Dry days
4
Rainy days
0
Snow days
35°/23°
Temperatures
20 km/h
Avg max wind
56 %
Avg humidity
Bexar County Weather September
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Temperatures trend during September in Bexar County
See the weather trend as well as the moving average line
September weather in Bexar County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Partly cloudy | 36° /24° | 3.2 mm | 9 | |
| Sept. 2 | Partly cloudy | 37° /23° | 1 mm | 9 | |
| Sept. 3 |  Sunny | 37° /24° | 5.5 mm | 9 | |
| Sept. 4 | Sunny | 37° /23° | 1.6 mm | 8 | |
| Sept. 5 | Partly cloudy | 37° /24° | 0 mm | 9 | |
| Sept. 6 |  Overcast | 35° /24° | 11.3 mm | 9 | |
| Sept. 7 |  Mist | 35° /24° | 2.9 mm | 9 | |
| Sept. 8 | Sunny | 37° /23° | 0 mm | 9 | |
| Sept. 9 | Partly cloudy | 36° /22° | 0.2 mm | 9 | |
| Sept. 10 | Sunny | 37° /22° | 0.5 mm | 9 | |
| Sept. 11 | Overcast | 37° /23° | 0.5 mm | 9 | |
| Sept. 12 | Overcast | 36° /24° | 0.1 mm | 9 | |
| Sept. 13 | Overcast | 35° /23° | 0.4 mm | 8 | |
| Sept. 14 | Overcast | 36° /23° | 0.1 mm | 8 | |
| Sept. 15 |  Thundery outbreaks possible | 35° /23° | 0 mm | 8 | |
| Sept. 16 |  Light rain shower | 35° /22° | 2.6 mm | 8 | |
| Sept. 17 | Overcast | 33° /25° | 0.1 mm | 6.9 | |
| Sept. 18 | Overcast | 35° /24° | 0 mm | 9.2 | |
| Sept. 19 | Sunny | 36° /22° | 0 mm | 9.8 | |
| Sept. 20 | Sunny | 36° /23° | 0 mm | 9.3 | |
| Sept. 21 | Sunny | 36° /23° | 0.1 mm | 9 | |
| Sept. 22 | Sunny | 36° /23° | 0 mm | 9 | |
| Sept. 23 | Sunny | 35° /23° | 0 mm | 9 | |
| Sept. 24 | Sunny | 35° /25° | 0.1 mm | 8 | |
| Sept. 25 | Sunny | 34° /23° | 1.1 mm | 8 | |
| Sept. 26 | Sunny | 32° /21° | 0 mm | 8 | |
| Sept. 27 | Sunny | 33° /21° | 0 mm | 8 | |
| Sept. 28 | Sunny | 34° /21° | 0 mm | 8 | |
| Sept. 29 | Sunny | 35° /22° | 0 mm | 8 | |
| Sept. 30 | Sunny | 35° /23° | 0 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.
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Bexar County in September - FAQ
What are the expected maximum and minimum temperatures in Bexar County during September?
With daytime temperatures soaring above 35° and not dropping much below 23° 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?
In September, Bexar County can expect light to moderate rainfall, totaling 36.1 mm across approximately 4 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Bexar County during September?
The average wind speed in Bexar County during September is 20 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 💧
Typically, Bexar County has 4 rainy days in September with a total of 36.1 mm of rainfall.
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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