In May, San Antonio typically sees daytime highs of 16.8°C and overnight lows around 7.7°C. Compared to the annual average high of 18.7°C, May runs -1.9°C.
May in San Antonio averages a daytime high of 16.8°C and an overnight low of 7.7°C.
May runs -1.9°C compared to San Antonio's annual average high of 18.7°C, ranking #8 of 12 months by warmth.
Plan for daytime highs near 16.8°C and cooler evenings around 7.7°C.