Hainan Island is located in the northern edge of the tropics and belongs to the tropical monsoon climate. It has always been known as a "natural greenhouse". Summer is not long in winter, with an annual average temperature of 22 ~ 26℃ and accumulated temperature of 8200℃ greater than or equal to 10℃. In the coldest January and February, the temperature still reaches 16 ~ 2 1℃, and there is sunshine all year round. Hainan Island is an ideal breeding base in South China because of its early spring, rapid temperature rise, large daily temperature difference, frost-free all year round and warm winter. There is no real heat and winter.
Hainan Province is abundant in rainfall, with an average annual rainfall of 1639 mm, with obvious rainy season and less rainy season. May ~ 10 is the rainy season every year, and the total rainfall is about 1500mm, accounting for 70 ~ 90% of the total annual rainfall. The main rain sources are frontal rain, thermal thunderstorm and typhoon rain. The rainy season is 1 1 until April of the following year, accounting for only 10 of the annual rainfall.
The air quality is closely related to the content of negative ions in the air. According to experts' determination, the content of negative ions in Hainan Island is as high as 0/0000 per cubic centimeter, which is far higher than the standard concentration of negative ions in fresh air stipulated by the World Health Organization (1000 ~ 1500/cubic centimeter). It can be said that it is a natural "big oxygen bar". Compared with inland Hainan Island, the negative oxygen ion content is 103 times that of inland Hainan Island, and it is the city with the highest negative oxygen ion content in the world after Cuba.
The island is evergreen, the air is fresh, and the forest coverage rate exceeds 60.2%, which is exactly the case. Hainan Island is known as "a good place to return to nature, the largest original ecological oxygen bar in China", with an average life expectancy of 82 years, and is known as "Healthy Island and Longevity Island".