In December, Flensburg typically sees daytime highs of 3.5°C and overnight lows around -0.4°C. Compared to the annual average high of 11.2°C, December runs -7.7°C.
December in Flensburg averages a daytime high of 3.5°C and an overnight low of -0.4°C.
December runs -7.7°C compared to Flensburg's annual average high of 11.2°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 3.5°C and cooler evenings around -0.4°C.