In December, Winterthur typically sees daytime highs of 3.0°C and overnight lows around -1.9°C. Compared to the annual average high of 12.8°C, December runs -9.8°C.
December in Winterthur averages a daytime high of 3.0°C and an overnight low of -1.9°C.
December runs -9.8°C compared to Winterthur's annual average high of 12.8°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 3.0°C and cooler evenings around -1.9°C.