Where is colder in winter in Wanning and the east?

Wanning is located in the southeast of Hainan Island, with a tropical monsoon climate. The temperature is higher in winter, with an average temperature of 18-25 degrees Celsius. Dongfang City, located in the northwest of Hainan Island, has a tropical maritime climate, with high temperature in winter, with an average temperature of 19-26 degrees Celsius.