What does beginning of autumn Autumn Tiger mean?

Weather above 35℃ after short-term heat recovery after three days.

Autumn tiger, in meteorology, refers to the weather above 35℃ after a short period of heat recovery after lodging for three days.

Occurred between the end of August and September of the Gregorian calendar every year. The reason for the formation of autumn tiger is that the western Pacific subtropical high that controls China gradually moves southward in autumn, but moves northward. Under the control of this high pressure, it is partly cloudy, sunny to sunny, with strong sunshine and rising temperature.

The weather is characterized by cool in the morning and evening and high temperature exposure in the afternoon. Due to the vast territory of China, the performance of "Autumn Tiger" is slightly different. For example, autumn tigers in South China come later than those in the Yangtze River valley.

In addition, the annual control time of autumn tigers is long or short, lasting for half a month to two months; Sometimes the autumn tiger comes and goes, and then goes back.