The climate in San Antonio during September can be summarized as warm and a little damp.
September is in the spring in San Antonio and is typically the 5th coldest month of the year. Daytime maximum temperatures average around a comfortable 27°C (80°F), whilst at night 16°C (61°F) is normal.
Daytime temperature | 26.5°C 79.7°F |
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Nightly temperature | 16.3°C 61.3°F |
Average temperature | 21.4°C 70.5°F |
Daily sunshine | 7.1 hrs |
Avg rainfall | 82 mm 3.2 ins |
Rainy days | 6 days |
Sea temperature | 17.9°C 64.1°F |
Humidity | 65% |
Windspeed | 13kph 8 mph |
On average September is the 4th driest month of the year in San Antonio with around 82mm 3.2 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.1 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in San Antonio in September 2024.
Best places to visit in September
Hottest month: | January | 33.3°C 91.9°F |
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Driest month: | July | 54mm 2.1ins |
Sunniest month: | December | 9.9hrs |
Coldest month: | June | 22.4°C 72.3°F |
Wettest month: | November | 161mm 6.3ins |