What is the weather like in Austin vs San Antonio in September?

In September, Austin averages 34°C high / 22°C low with about 63 mm of rain; San Antonio averages 35°C high / 22°C low with about 85 mm.

Austin vs San Antonio in September

Austin and San Antonio are nearly tied in September — 66 vs 64 on SeasonMap's comfort score. Austin is sweltering, a little rain, clean air; San Antonio is sweltering, rainy, clean air.

Austin vs San Antonio — September climate, side by side

	🇺🇸 Austin	🇺🇸 San Antonio
Comfort score	66/100 (C)	64/100 (C)
Feels-like high	37°C	37°C
Avg high / low	34° / 22°	35° / 22°
Rainfall	63 mm	85 mm
Rainy days	4	5
Humidity	65%	65%
Air quality (AQI)	44	42

Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.

Month by month

Austin vs San Antonio in September — FAQ

Is September better in Austin or San Antonio?: Austin and San Antonio are nearly tied in September — 66 vs 64 on SeasonMap's comfort score. Austin is sweltering, a little rain, clean air; San Antonio is sweltering, rainy, clean air.
What is the weather like in Austin vs San Antonio in September?: In September, Austin averages 34°C high / 22°C low with about 63 mm of rain; San Antonio averages 35°C high / 22°C low with about 85 mm.