January in Bielefeld averages a daily high of 4.3°C with nights around -0.2°C. Expect roughly 17.4 wet days totalling 73.3mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Bielefeld is May–September.
Based on BAD SALZUFLEN, GM (17km), 1995–2024. 30 years of January data.