May in Guiyang averages a daily high of 23.8°C with nights around 15.6°C. Expect roughly 16.2 wet days totalling 176.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Guiyang is August–September.
Based on GUIYANG, CH (1.6km), 1995–2024. 18 years of May data.