Is it summer in Sanya all year round?

No. Sanya is not summer all year round. Although it is located in the tropics and belongs to the tropical monsoon climate, Sanya has no obvious winter. The lowest temperature in winter is not lower than 15 degrees, and the highest temperature in summer is 38 degrees. Therefore, the climate in Sanya can be described as "it's always summer, and it turns into autumn when it rains", which means that although the weather is hot all the year round, the temperature will be relatively low when there is a lot of rain, giving people a cool feeling. In addition, winter in Sanya is the most pleasant season, and the climate is comfortable and humid, unlike the obvious seasonal changes in inland areas.