Geographical and climatic characteristics of Jinan

Jinan is located in the mid-latitude zone, influenced by solar radiation, atmospheric circulation and geographical environment, and belongs to the continental monsoon climate of warm temperate zone. Its main climatic characteristics are: the monsoon is obvious and the four seasons are distinct; In winter, Leng Xia is hot and the rainfall is concentrated. In winter, Jinan is controlled by Mongolian cold high pressure, and the cold northerly wind blows. Generally, there is a cold air intrusion every 6 ~ 8 days, which makes the temperature drop continuously. In winter, the average temperature in Leng Yue is below 0℃, the average extreme minimum temperature is below -20℃ (-19.7℃ in the northern suburb of Jinan and -22.5℃ in the eastern suburb of Jinan), and 98% of the severe cold days below-10℃ are concentrated in winter. The maximum frozen soil depth is about 45cm, and the maximum snow depth is about 20cm. The winter precipitation is 20 ~ 25mm, accounting for only 3.0 ~ 3.7% of the total annual precipitation. There is little rain and snow throughout the winter, and the north wind is frequent, dry and cold.