Autumn is the beginning of the fall season, which signals the end of the hot summer and the coming of autumn, but it is not the same as the beginning of autumn.

Autumn" is based on the climatological division of the four seasons of the standard to define the average daily temperature for five consecutive days stabilized at 22 degrees Celsius below the real into the autumn, and different weather conditions each year, early and late into the autumn varies greatly, the time difference can be up to two or three weeks.