In June, San Marcos typically sees daytime highs of 33.1°C and overnight lows around 21.0°C. Compared to the annual average high of 26.3°C, June runs +6.8°C.
June in San Marcos averages a daytime high of 33.1°C and an overnight low of 21.0°C.
June runs +6.8°C compared to San Marcos's annual average high of 26.3°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 33.1°C and cooler evenings around 21.0°C.