How long has it been hot since autumn?

It is still very hot about 18 days after autumn.

After beginning of autumn this year, there are still 9 days of middling and 1 day of final lodging, and there are 19 days of dog days after beginning of autumn, setting a new historical record for many years.

Generally speaking, it will be very hot for at least half a month after autumn. But it's just muggy during the day and the temperature is still very low at night.

According to the experience over the years, it will be hot for some time after beginning of autumn, but not for a long time. Generally, there is a saying that beginning of autumn got angry for eighteen days. After 18, the weather will be cooler in the morning and evening, and it will be more comfortable than in July.