In May, Normal typically sees daytime highs of 23.2°C and overnight lows around 10.0°C. Compared to the annual average high of 16.4°C, May runs +6.8°C.
May in Normal averages a daytime high of 23.2°C and an overnight low of 10.0°C.
May runs +6.8°C compared to Normal's annual average high of 16.4°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 23.2°C and cooler evenings around 10.0°C.