In May, Green Bay typically sees daytime highs of 19.8°C and overnight lows around 6.4°C. Compared to the annual average high of 12.4°C, May runs +7.4°C.
May in Green Bay averages a daytime high of 19.8°C and an overnight low of 6.4°C.
May runs +7.4°C compared to Green Bay's annual average high of 12.4°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 19.8°C and cooler evenings around 6.4°C.