In August, San Antonio typically sees daytime highs of 35.3°C and overnight lows around 22.5°C. Compared to the annual average high of 26.8°C, August runs +8.5°C.
August in San Antonio averages a daytime high of 35.3°C and an overnight low of 22.5°C.
August runs +8.5°C compared to San Antonio's annual average high of 26.8°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 35.3°C and cooler evenings around 22.5°C.