January in Tartu averages a daily high of -2.1°C with nights around -6.8°C. Expect roughly 18.9 wet days totalling 46.8mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Tartu is May–August.
Based on TARTU TORAVERE, EN (20.1km), 1995–2024. 30 years of January data.