December in Gummersbach averages a daily high of 5.5°C with nights around 0.7°C. Expect roughly 18.5 wet days totalling 98.2mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Gummersbach is May–September.
Based on NEUNKIRCHEN SEELSCHEID KRAWINK, GM (24.2km), 1995–2024. 30 years of December data.