In December, Giessen typically sees daytime highs of 3.5°C and overnight lows around -1.3°C. Compared to the annual average high of 12.8°C, December runs -9.3°C.
December in Giessen averages a daytime high of 3.5°C and an overnight low of -1.3°C.
December runs -9.3°C compared to Giessen's annual average high of 12.8°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 3.5°C and cooler evenings around -1.3°C.