What is the coldest temperature in Wanning in winter?

About 20 degrees Celsius. Wanning is a county-level city directly under Hainan Province, located in the southeast of Hainan Island, with a tropical maritime monsoon climate. The average temperature in winter is about 20~25 degrees Celsius, and the local temperature is very high. You need to wear half sleeves, shorts, skirts, etc. Every day, this will make the local people feel very cool, so the coldest time in Wanning in winter is about 20 degrees Celsius.