In December, Basel typically sees daytime highs of 4.3°C and overnight lows around -1.2°C. Compared to the annual average high of 13.9°C, December runs -9.6°C.
December in Basel averages a daytime high of 4.3°C and an overnight low of -1.2°C.
December runs -9.6°C compared to Basel's annual average high of 13.9°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 4.3°C and cooler evenings around -1.2°C.