Why is it so hot after a long summer? After the long summer, the temperature is getting lower and lower.

Will it be hot in the long summer? The north and south are vast, the north is cool and the south is high.

In ancient China, beginning of spring, Changxia, beginning of autumn and beginning of winter indicated the arrival of spring, summer, autumn and winter respectively. Meteorology takes the average temperature of five days as the standard. When the average temperature stably passes 10℃ for five days after winter, it means beginning of spring; when the temperature is higher than 22℃, it means long summer.

The average temperature in most areas in long summer is around 18 ~ 20℃, which is the mid-spring and late spring season. In May, Sophora japonica blooms in many places. In the long summer, everything is thriving. China has a vast territory between the north and the south, with great temperature difference between the north and the south, and frequent fluctuations in the same area. The temperature in the rest of South China is around 20℃. The low-altitude valley felt hot in summer as early as mid-April, and the temperature in long summer was above 24℃. So the long summer is cool in the north and slightly hot in the south.