May in Menglang averages a daily high of 30.6°C with nights around 18.5°C. Expect roughly 15.8 wet days totalling 145.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Menglang is November–February.
Based on LANCANG, CH (2.4km), 1995–2024. 30 years of May data.