January in Tønsberg averages a daily high of 1.1°C with nights around -4.5°C. Expect roughly 13.8 wet days totalling 98.2mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Tønsberg is June–September.
Based on MELSOM, NO (5.4km), 1995–2024. 22 years of January data.