In April, San Antonio typically sees daytime highs of 18.9°C and overnight lows around 8.6°C. Compared to the annual average high of 18.7°C, April runs +0.2°C.
April in San Antonio averages a daytime high of 18.9°C and an overnight low of 8.6°C.
April runs +0.2°C compared to San Antonio's annual average high of 18.7°C, ranking #6 of 12 months by warmth.
Plan for daytime highs near 18.9°C and cooler evenings around 8.6°C.