Causes of continuous rainy weather in Guanzhong area of Shaanxi Province from May to June 9 to 65438+10 every year

Your feelings are right. This is a unique climate phenomenon in West China-autumn rain in West China, which occurs in Sichuan Basin, northern Yunnan-Guizhou Plateau, Guanzhong, southern Shaanxi and southern Gansu. The main reason is that every autumn, North China is controlled by high pressure, and Siberia and Mongolia are also controlled by high pressure, thus forming a low-pressure area in western China, where cold and warm air meet frequently, forming a climate phenomenon of continuous rain in autumn here.

For Guanzhong area in Shaanxi Province, due to less precipitation in summer and the influence of autumn rain in West China, autumn has certainly become the main rainy season here. Take Xi 'an as an example. The month with the largest precipitation in Xi 'an is not July and August in summer, but September in autumn. The biggest month of Weihe River runoff is also September, which is the same as your feeling.