March in Tønsberg averages a daily high of 6°C with nights around -2.1°C. Expect roughly 12.3 wet days totalling 65.3mm. 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 March data.