In December, Koeln typically sees daytime highs of 5.5°C and overnight lows around 0.7°C. Compared to the annual average high of 13.9°C, December runs -8.4°C.
December in Koeln averages a daytime high of 5.5°C and an overnight low of 0.7°C.
December runs -8.4°C compared to Koeln's annual average high of 13.9°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 5.5°C and cooler evenings around 0.7°C.