In March, San Marcos typically sees daytime highs of 19.2°C and overnight lows around 6.9°C. Compared to the annual average high of 23.0°C, March runs -3.8°C.
March in San Marcos averages a daytime high of 19.2°C and an overnight low of 6.9°C.
March runs -3.8°C compared to San Marcos's annual average high of 23.0°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 19.2°C and cooler evenings around 6.9°C.