In May, Round Rock typically sees daytime highs of 29.2°C and overnight lows around 17.2°C. Compared to the annual average high of 25.8°C, May runs +3.4°C.
May in Round Rock averages a daytime high of 29.2°C and an overnight low of 17.2°C.
May runs +3.4°C compared to Round Rock's annual average high of 25.8°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 29.2°C and cooler evenings around 17.2°C.