January in Marienthal averages a daily high of 4.3°C with nights around -0.5°C. Expect roughly 15.6 wet days totalling 66.7mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Marienthal is May–September.
Based on HAMBURG FUHLSBUETTEL, GM (9.8km), 1995–2024. 30 years of January data.