In December, Siegen typically sees daytime highs of 2.7°C and overnight lows around -2.0°C. Compared to the annual average high of 11.5°C, December runs -8.8°C.
December in Siegen averages a daytime high of 2.7°C and an overnight low of -2.0°C.
December runs -8.8°C compared to Siegen's annual average high of 11.5°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 2.7°C and cooler evenings around -2.0°C.