Why does the weather in Chongqing fluctuate so much this year?

Chongqing is located in the subtropical inland area of the northern hemisphere. It is the longest city, basin and rolling hills north of Nanling in China in summer, which makes it difficult to dissipate heat in summer, especially the five-month heat. Its climate features are like several common sayings: unstable temperature in early spring, hot and rainy in summer, cool and rainy in autumn and warm and snowy in winter. The annual average temperature in Chongqing is 65438 08℃. The lowest temperature is 5438+ 10 in June, the monthly average temperature is 7℃, and the lowest extreme temperature is -3.8℃. The highest temperature is from July to August, mostly between 27-38℃, and the highest limit temperature can reach 43.8℃. Therefore, Chongqing, Wuhan and Nanjing are also called the three "stoves" in the Yangtze River Basin. The rainy season in Chongqing is concentrated in summer and autumn, and the annual rainfall is1000-1100 ml. Especially it rains at night, which is very interesting. Poets of past dynasties often wrote poems and lyrics on the topic of "Late Rain". Chongqing is also known as the "foggy city". It is foggy from late autumn to early spring every year, with an average annual foggy day of 68 days. Every foggy day, the city is shrouded in mist, and the streets and alleys are misty and blurred, just like a fairyland. Chongqing is also one of the cities with the least sunshine in China, with annual sunshine hours of 1, 259.5 hours. It is slightly higher in July and August, and the average monthly sunshine hours are 230 hours. Other months are below 150 hours. Chongqing is surrounded on three sides by mountains and ravines, so the wind speed is small. In the thunderstorm weather in summer, it is abnormal, often accompanied by strong winds, and the wind speed can reach 10-27 meters per second.