What's the weather like in the Pearl River Delta in autumn, and Hainan Island?

China's Pearl River Delta region belongs to marginal tropical monsoon climate, which is characterized by high temperature, more precipitation, less frost days, more sunshine, low wind speed and frequent thunderstorms. The annual average temperature is 22 degrees, the annual average rainfall 1982.7mm, the annual average sunshine hours 1800 hours or more, and the average relative humidity is 68%. The same period of water and heat throughout the year, abundant rainfall, is conducive to plant growth. April-June is the rainy season, and August-September is the best season for tourism, with hot weather and many typhoons. 10- 12 has moderate temperature.