January in Wilhelmshaven averages a daily high of 5.2°C with nights around 1.1°C. Expect roughly 16.7 wet days totalling 69.5mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Wilhelmshaven is May–September.
Based on WANGERLAND HOOKSIEL, GM (10.6km), 1995–2024. 24 years of January data.