January in Karlsruhe averages a daily high of 5.5°C with nights around -0.3°C. Expect roughly 15.3 wet days totalling 61.9mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Karlsruhe is May–September.
Based on RHEINSTETTEN, GM (6.7km), 1995–2024. 16 years of January data.