In December, Leuven typically sees daytime highs of 5.8°C and overnight lows around 1.0°C. Compared to the annual average high of 13.7°C, December runs -7.9°C.
December in Leuven averages a daytime high of 5.8°C and an overnight low of 1.0°C.
December runs -7.9°C compared to Leuven's annual average high of 13.7°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 5.8°C and cooler evenings around 1.0°C.