May in Tønsberg averages a daily high of 16.4°C with nights around 6.7°C. Expect roughly 12.9 wet days totalling 69.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Tønsberg is June–September.
Based on MELSOM, NO (5.4km), 1995–2024. 23 years of May data.