Beginning of autumn or the autumnal equinox, which is autumn?

The climate in autumn is defined as: the five-day moving average temperature is ≤22℃, which means that autumn begins on the day when the five-day average temperature in China and Japan is ≤22℃ (the average autumn date is165438+1October 3). Traditionally, "beginning of autumn" with 24 solar terms is the starting point of autumn. Entering autumn means that rainfall and storms tend to decrease or decrease, and everything in nature begins to mature from lush. The beginning of autumn does not mean the end of hot weather. As the saying goes, "the summer heat is in dog days", according to the calculation method of "dog days", beginning of autumn is often in dog days until the summer heat, so the weather is still very hot in early autumn, and it will generally get cold after the Millennium solar terms. The climate in autumn is divided into two stages, the early autumn is sultry, and the climate tends to be dry and cool after the Mid-Autumn Festival.