In April, San Marcos typically sees daytime highs of 26.4°C and overnight lows around 13.8°C. Compared to the annual average high of 26.3°C, April runs +0.2°C.
April in San Marcos averages a daytime high of 26.4°C and an overnight low of 13.8°C.
April runs +0.2°C compared to San Marcos's annual average high of 26.3°C, ranking #7 of 12 months by warmth.
Plan for daytime highs near 26.4°C and cooler evenings around 13.8°C.