May in Sanming averages a daily high of 29.4°C with nights around 19.8°C. Expect roughly 16.8 wet days totalling 249.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Sanming is October–November.
Based on YONGAN, CH (41.2km), 1995–2024. 24 years of May data.