In May, Milwaukee typically sees daytime highs of 18.0°C and overnight lows around 7.5°C. Compared to the annual average high of 12.6°C, May runs +5.4°C.
May in Milwaukee averages a daytime high of 18.0°C and an overnight low of 7.5°C.
May runs +5.4°C compared to Milwaukee's annual average high of 12.6°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 18.0°C and cooler evenings around 7.5°C.