May in Weihai averages a daily high of 17.9°C with nights around 11.4°C. Expect roughly 6.9 wet days totalling 55.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Weihai is September–October.
Based on CHENGSHANTOU, CH (51.7km), 1995–2024. 24 years of May data.