January in Herne averages a daily high of 5.5°C with nights around 0.6°C. Expect roughly 17.9 wet days totalling 74mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Herne is May–September.
Based on BOCHUM, GM (7.2km), 1995–2024. 13 years of January data.