Did Jilin enter summer in May?

According to Caijing's data. Com, as of May 30, 2023, the average temperature in Jilin in May was 8℃-22℃, with little precipitation. Northeast China is a place with obvious seasonal changes. For Northeast China, the weather heat will increase continuously during the summer solstice, so the highest temperature of 22℃ in Jilin in May is already summer, but it is still very cold at night.

Compared with the map of Central and South China, the northeast summer is late, mainly because the northeast cold vortex is active frequently, and it becomes active near summer, with relatively more precipitation. The northeast cold vortex is a major weather system affecting Northeast China and even North China. It will bring cool weather, "help" clear smog in winter, and it will also slow down in summer.