In May, Appleton typically sees daytime highs of 20.0°C and overnight lows around 6.8°C. Compared to the annual average high of 12.5°C, May runs +7.5°C.
May in Appleton averages a daytime high of 20.0°C and an overnight low of 6.8°C.
May runs +7.5°C compared to Appleton's annual average high of 12.5°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 20.0°C and cooler evenings around 6.8°C.