May in Dongning averages a daily high of 18.2°C with nights around 5.5°C. Expect roughly 12.9 wet days totalling 75.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Dongning is September.
Based on SUIFENHE, CH (33.3km), 1995–2024. 30 years of May data.