Hainan Island is a place with "flowers all the time, long summer without winter" and special climatic conditions. The climate of Hainan Island belongs to the maritime tropical monsoon climate, with the annual average temperature ranging from 22℃ to 26℃. In January, the average temperature in most areas was still above 19℃. The hottest average temperature in July is between 28℃ and 32℃. The average annual rainfall is more than 16 mm, with the most abundant rainfall in August and September, when heavy rain occurs and typhoons often attack. Evergreen all year round; Flowers bloom at all times, and it is suitable for traveling all year round. Hainan Island is endowed with unique tourism resources, known as the "Oriental Hawaii" and the largest "Winter Capital" in the world. July is the month with the highest temperature, but the average temperature is only 28.4℃. Because of the sea breeze, it is not very sultry and scorching. January is the coldest month, but the average temperature is 17.2℃, which is even warmer than spring. Hainan Island is abundant in rainfall, with an annual rainfall of more than 1,6 mm, with the most abundant rainfall in August and September, when there are heavy rains and typhoons.
Hainan is the place with the most tropical marine climate characteristics in China. It is warm and hot all year round, with abundant rainfall, obvious wet and dry seasons, strong normal winds, frequent tropical storms and typhoons and diverse climate resources. The annual total solar radiation in Hainan Island is about 11-14 kcal/cm2, the annual sunshine hours are 175-265 hours, and the illumination rate is 5- 6%. According to the region, the sunshine hours are the most in the western coastal areas and the least in the central mountainous areas; According to the season, according to the order of summer, spring, autumn and winter, from more to less. The annual average temperature is between 23-25℃, which is lower in the central mountainous area and higher in the southwest. There is no winter in the whole year, and it is coldest in January and February, with an average temperature of 16-24℃ and an average extreme low temperature above 5℃. In summer, the average temperature is the highest from mid-March to early November, and July to August, at 25-29℃. West, south and zhongsha islands belong to tropical marine climate, with long summer and no winter, and the annual average temperature is 26.5℃. ?
The center of Hainan Island is in the mountainous area east of central China, with an annual rainfall of about 2,-2,4 mm, and the annual rainfall in the western rainless area is about 1,-1,2 mm.. The seasonal distribution of rainfall is uneven. Winter and spring are dry, and the dry season lasts for 6 to 7 months from November to April and May of the following year. There is a lot of rainfall in summer and autumn. May to October is the rainy season. The total rainfall in the rainy season is about 15mm, accounting for 7-9% of the annual rainfall. The rain sources include frontal rain, hot thunderstorm and typhoon rain. The humidity in Hainan Island is high throughout the year, and the annual average water vapor pressure is about 23 hectopascals (Qiongzhong) to 26 hectopascals (Sanya).
Hainan Island is the main land of Hainan Province, with a Sydney-like oval shape on the plane, and its long axis running northeast-southwest. It is 24 kilometers long, 21 kilometers wide and covers an area of about 34,4 square kilometers, making it the second largest island in China after Taiwan Province Island.
Hainan Island is low and flat around, towering in the middle, with dome-shaped mountain topography, with Wuzhishan and Ying Ge Ridge as the uplift core, and gradually descending to the periphery. The annular layered landform is composed of mountains, hills, terraces and plains, and the cascade structure is obvious.