March in Nagasaki averages a daily high of 15.3°C. Expect roughly 11.4 wet days totalling 126.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Nagasaki is April–May.
Based on NAGASAKI, JA (2.6km), 1995–2024. 22 years of March data.