May in Thanh Hóa averages a daily high of 31.1°C. Expect roughly 10.4 wet days totalling 138.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Thanh Hóa is November–February.
Based on THANH HOA, VM (5.8km), 1995–2024. 22 years of May data.