In December, Iserlohn typically sees daytime highs of 4.2°C and overnight lows around -0.3°C. Compared to the annual average high of 12.5°C, December runs -8.3°C.
December in Iserlohn averages a daytime high of 4.2°C and an overnight low of -0.3°C.
December runs -8.3°C compared to Iserlohn's annual average high of 12.5°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 4.2°C and cooler evenings around -0.3°C.