In December, Mainz typically sees daytime highs of 4.4°C and overnight lows around -0.4°C. Compared to the annual average high of 14.1°C, December runs -9.7°C.
December in Mainz averages a daytime high of 4.4°C and an overnight low of -0.4°C.
December runs -9.7°C compared to Mainz's annual average high of 14.1°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 4.4°C and cooler evenings around -0.4°C.