In August, San Antonio typically sees daytime highs of 25.6°C and overnight lows around 12.9°C. Compared to the annual average high of 28.9°C, August runs -3.3°C.
August in San Antonio averages a daytime high of 25.6°C and an overnight low of 12.9°C.
August runs -3.3°C compared to San Antonio's annual average high of 28.9°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 25.6°C and cooler evenings around 12.9°C.