January in Vilnius averages a daily high of -1.5°C with nights around -6.2°C. Expect roughly 16.8 wet days totalling 34.4mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Vilnius is June–September.
Based on VILNIUS, LH (13.1km), 1995–2024. 15 years of January data.