In May, Lewisville typically sees daytime highs of 28.3°C and overnight lows around 17.1°C. Compared to the annual average high of 24.6°C, May runs +3.8°C.
May in Lewisville averages a daytime high of 28.3°C and an overnight low of 17.1°C.
May runs +3.8°C compared to Lewisville's annual average high of 24.6°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 28.3°C and cooler evenings around 17.1°C.