In March, San Antonio typically sees daytime highs of 21.5°C and overnight lows around 10.7°C. Compared to the annual average high of 18.7°C, March runs +2.7°C.
March in San Antonio averages a daytime high of 21.5°C and an overnight low of 10.7°C.
March runs +2.7°C compared to San Antonio's annual average high of 18.7°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 21.5°C and cooler evenings around 10.7°C.