In May, San Tan Valley typically sees daytime highs of 34.0°C and overnight lows around 14.4°C. Compared to the annual average high of 29.7°C, May runs +4.3°C.
May in San Tan Valley averages a daytime high of 34.0°C and an overnight low of 14.4°C.
May runs +4.3°C compared to San Tan Valley's annual average high of 29.7°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 34.0°C and cooler evenings around 14.4°C.