In December, Jena typically sees daytime highs of 3.2°C and overnight lows around -1.9°C. Compared to the annual average high of 12.6°C, December runs -9.4°C.
December in Jena averages a daytime high of 3.2°C and an overnight low of -1.9°C.
December runs -9.4°C compared to Jena's annual average high of 12.6°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 3.2°C and cooler evenings around -1.9°C.