San Antonio (TX)
September
Weather in San Antonio, Texas for September 2027
Your guide to San Antonio weather in September - trends and predictions
In general, the average temperature in San Antonio at the beginning of September is 36 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 34.5 °C by the end of September.
San Antonio experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 45.3 mm.
Is September a good time to visit San Antonio? check out the best time to travel to San Antonio page.
✨ Is September a good time to visit San Antonio? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
24
Dry days
6
Rainy days
0
Snow days
35°/23°
Temperatures
20 km/h
Avg max wind
57 %
Avg humidity
San Antonio Weather September
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Temperatures trend during September in San Antonio
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September weather in San Antonio day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Light rain | 36° /25° | 3.2 mm | 9 | |
| Sept. 2 |  Patchy rain possible | 37° /23° | 1 mm | 9 | |
| Sept. 3 | Light rain | 37° /24° | 5.5 mm | 9 | |
| Sept. 4 | Patchy rain possible | 37° /23° | 1.6 mm | 8 | |
| Sept. 5 |  Partly cloudy | 37° /24° | 0 mm | 9 | |
| Sept. 6 |  Moderate rain | 35° /25° | 11.3 mm | 9 | |
| Sept. 7 | Light rain | 34° /24° | 2.9 mm | 9 | |
| Sept. 8 |  Sunny | 37° /23° | 0 mm | 9 | |
| Sept. 9 | Partly cloudy | 36° /23° | 0.2 mm | 9 | |
| Sept. 10 | Sunny | 37° /23° | 0.5 mm | 9 | |
| Sept. 11 |  Overcast | 37° /24° | 0.5 mm | 9 | |
| Sept. 12 | Overcast | 35° /24° | 0.1 mm | 9 | |
| Sept. 13 | Overcast | 35° /24° | 0.4 mm | 8 | |
| Sept. 14 | Overcast | 36° /24° | 0.1 mm | 8 | |
| Sept. 15 |  Thundery outbreaks possible | 35° /24° | 0 mm | 8 | |
| Sept. 16 | Light rain | 35° /22° | 2.6 mm | 8 | |
| Sept. 17 | Patchy rain possible | 36° /23° | 0.3 mm | 7 | |
| Sept. 18 | Overcast | 34° /24° | 0.9 mm | 7 | |
| Sept. 19 | Overcast | 35° /23° | 0.2 mm | 9 | |
| Sept. 20 | Overcast | 35° /23° | 0 mm | 7 | |
| Sept. 21 |  Cloudy | 35° /24° | 0 mm | 8 | |
| Sept. 22 | Patchy rain possible | 36° /24° | 0.6 mm | 8 | |
| Sept. 23 | Thundery outbreaks possible | 36° /24° | 0.4 mm | 7 | |
| Sept. 24 | Thundery outbreaks possible | 36° /24° | 4.1 mm | 6 | |
| Sept. 25 | Light rain | 34° /24° | 8 mm | 7 | |
| Sept. 26 | Overcast | 34° /23° | 0 mm | 7 | |
| Sept. 27 | Overcast | 34° /22° | 0 mm | 7 | |
| Sept. 28 | Partly cloudy | 36° /22° | 0 mm | 8 | |
| Sept. 29 | Overcast | 34° /22° | 0.1 mm | 7 | |
| Sept. 30 | Light rain shower | 35° /22° | 0.8 mm | 7 | |
| Next | |||||
Important Notice
Our weather forecast for San Antonio 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 San Antonio forecast closer to your planned date for the most up-to-date weather information.
Change Month
San Antonio in September - FAQ
What are the expected maximum and minimum temperatures in San Antonio during September?
With daytime temperatures soaring above 35° and not dropping much below 23° at night, September in San Antonio is quite hot. Staying hydrated and avoiding peak sun hours is advisable.
How much rainfall should be expected in San Antonio during September?
In September, San Antonio can expect light to moderate rainfall, totaling 45.3 mm across approximately 6 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in San Antonio during September?
The average wind speed in San Antonio during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in San Antonio
Explore the daily rainfall trends and prepare for San Antonios September weather 💧
Typically, San Antonio has 6 rainy days in September with a total of 45.3 mm of rainfall.
UV exposure in San Antonio during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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