In March, San Antonio typically sees daytime highs of 23.5°C and overnight lows around 10.0°C. Compared to the annual average high of 26.8°C, March runs -3.3°C.
March in San Antonio averages a daytime high of 23.5°C and an overnight low of 10.0°C.
March runs -3.3°C compared to San Antonio's annual average high of 26.8°C, ranking #8 of 12 months by warmth.
Plan for daytime highs near 23.5°C and cooler evenings around 10.0°C.