In May, Mainz typically sees daytime highs of 19.1°C and overnight lows around 8.3°C. Compared to the annual average high of 14.1°C, May runs +5.0°C.
May in Mainz averages a daytime high of 19.1°C and an overnight low of 8.3°C.
May runs +5.0°C compared to Mainz's annual average high of 14.1°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 19.1°C and cooler evenings around 8.3°C.