May in Qui Nhon averages a daily high of 33.5°C with nights around 27.3°C. Expect roughly 8.1 wet days totalling 108.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Qui Nhon is January–March.
Based on QUI NHON, VM (1.3km), 1995–2024. 22 years of May data.