May in Haicheng averages a daily high of 22.4°C with nights around 13.4°C. Expect roughly 7.3 wet days totalling 54.3mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Haicheng is May–June.
Based on YINGKOU, CH (50.5km), 1995–2024. 24 years of May data.