Climatic characteristics of Yichun

Yichun is located in low latitude and has the characteristics of subtropical humid climate. Although the weather is changeable in spring, it warms earlier. It is wet and rainy at the turn of spring and summer, sunny and hot in summer, dry in autumn and cold in winter, but the frost period is short. Four distinct seasons, short spring and autumn, long summer and winter. Generally speaking, Yichun has a warm climate, abundant sunshine, abundant rainfall and a long frost-free period. The annual average temperature in Yichun is 65438 07.2℃. The average temperature in the hottest month is 28.8℃ in July, 5.3℃ in Leng Yue 1 month and 267.9 days in frost-free period. The city is rich in precipitation, with annual precipitation greater than annual evaporation. The average annual precipitation in Yichun is 1680.2 mm, and the seasonal distribution of precipitation is very uneven. From June 5438 to February of the following year, affected by the dry and cold Siberian high or Mongolian high, the precipitation was generally less, accounting for only about 25% of the whole year. Before and after the rainy season, it began to be affected by the warm and humid airflow, and the rainfall gradually increased. The average precipitation from April to June accounts for 50% of the total precipitation in the whole year. The annual average sunshine hours in Yichun are 1737. 1 hour, the daily average sunshine hours are 4.83 hours, and the annual average total solar radiation is 105.2 kcal/cm2, which is the same as the distribution and variation law of sunshine hours.