The weather in San Antonio in September is very hot. The average temperatures are between 23°C and 32°C, drinking water regularly is advisable.
You can expect about 3 to 8 days of rain in San Antonio during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in San Antonio in September 2024.
If you’re planning to visit San Antonio in the near future, we highly recommend that you review the 14 day weather forecast for San Antonio before you arrive.
Temperatures
32° / 23°
Rainy Days
7
Snowy Days
0
Dry Days
23
Rainfall
142
mm
Sun Hours
11.0
Hrs