January in Düren averages a daily high of 4.5°C with nights around -0.1°C. Expect roughly 16.8 wet days totalling 78mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Düren is June–September.
Based on NIDEGGEN SCHMIDT, GM (15.1km), 1995–2024. 30 years of January data.