I know something about the weather in Sanya.

The winter in Sanya is very short, and the lowest temperature is about 14 degrees, which won't last long. In winter, we usually wear short sleeves and a coat (windproof coat is enough, but if we are afraid of the cold, we can make it thicker, so that we don't need a down jacket, but considering that we are afraid of the cold at home, we should take it with us). Also, the cold in Sanya is relatively dry, so you can buy some hydrating cream. Dabao is the best, which can prevent the skin from being too dry.

Except winter, Sanya is summer. The sun is quite big and the ultraviolet rays are strong. It is recommended to buy sunscreen.

Rainy days in Sanya are the most comfortable weather, so don't worry about how many degrees it will drop. It's not like the north.

If there is anything you don't understand, you can ask it in detail.

I wish I could help you.