Weather in Chengmai County, Haikou City

Located in the northern edge of the low latitude tropical zone, it has a tropical maritime climate, with warm spring, little rain and much drought, high temperature and rainy summer, frequent typhoon and rainstorm in autumn and cold showers in winter. The sunshine time is long all year round, and the radiation energy is large. The annual average sunshine hours are 2225 hours, and the solar radiation can reach 1 1 to 120000 kcal. The annual average temperature is 23.8℃, the highest average temperature is about 28℃, the lowest average temperature is about 18℃, and the annual frost-free period is 346 days. The annual average rainfall is 1.664 mm, the daily average rainfall is more than 0.65,438+0 mm, and the rainy days are more than 1.50 days. The annual average evaporation is 65438 0834 mm, the dryness is 65438 0.08 degrees, and the average relative humidity is 85%. The northeast wind and easterly wind predominate throughout the year, with an annual average wind speed of 3.4m/s, and there is a strong cold current in winter, which brings a short-term chill; May-165438+ 10, sometimes affected by tropical cyclones.

Geography Haikou City is located at19 32'-20 05' north latitude and10'-11'east longitude. Located in the northern part of Hainan Island, bordering Qiongzhou Strait in the north, facing Hai 'an Town of Guangdong Province at 18 nautical mile; Wenchang city in the east; It borders Wenchang City and Ding 'an County in the south and Chengmai County in the west. Haikou City starts from the old village of Dapo Town in the east and reaches Punan Village of Xixiu Town in the west, with a distance of 60.6 kilometers between the two ends; It starts from Wuchang Village, Dapo Town in the south and reaches the sea in the north, with a distance of 62.5 kilometers between the two ends. The land area of the city is 2304.84 square kilometers.

Haikou City is slightly longer, heart-shaped and flat. Nandujiang is the longest river in Hainan Island, passing through the center of Haikou. The eastern part of Nandu River is slightly inclined from south to north, and the western part of Nandu River is inclined from north to south. It is high in the northwest and southeast, low along Nandu River in the middle, and mostly coastal plains in the north. Except Ma 'anling in Shishan Town (222.2m above sea level), Jiuzhouling in Jiuzhou Town (199.9m), Riziling in Jiazi Town (17 1 m) and Leihuling in Yongxing Town (168.3m), the city is relatively high. Ma 'anling is the highest point in this city. The surface is mainly quaternary basic volcanic rocks and quaternary loose sediments, with a large distribution area. The coastal terrace landform is dominant, and the typical volcanic landform is dominant in the west. Urban landforms are basically divided into northern coastal plains, central areas along the Yangtze River, eastern and southern Taiwan Province areas, and western lava platform areas.

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