Why is it also June+10 in 5438, with the most rainy days in southwest China? Is there the most rain and snow in Northeast China?

Southwest: In June 5438+10, the Pacific subtropical high weakened. At this time, the winter wind began to invade the land, while the southwest monsoon was still strong. The warm and humid southwest airflow meets the cold and dry winter monsoon, forming frontal rain and increasing the number of rainy days.

Northeast: 65438+ 10, which is also the time when cold and warm air meet. 10, it snows only in the northeast, for example:

(10 month) mean high temperature and mean low temperature

Beijing: 196

Changchun: 142

When cold air comes from the Mongolian Plateau and Siberia, it usually snows in Changchun, while it snows at an average of 6 degrees in Beijing.