In May, Decatur typically sees daytime highs of 26.9°C and overnight lows around 13.9°C. Compared to the annual average high of 22.1°C, May runs +4.8°C.
May in Decatur averages a daytime high of 26.9°C and an overnight low of 13.9°C.
May runs +4.8°C compared to Decatur's annual average high of 22.1°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 26.9°C and cooler evenings around 13.9°C.