When does it start to cool down every summer? It's still very hot after beginning of autumn. Do we have to wait until after the heat?

Yes, it won't get cold until after the high temperature in summer.

Because the days are long and the nights are short in summer, the heat gained during the day is more than the heat radiated at night, and the income and expenditure are unbalanced, so the temperature accumulation near the surface will become larger and larger, reaching the maximum during the summer solar term. It is precisely because of the solar altitude angle and heat budget that the summer solar term temperature is the highest.

The weather will gradually cool down after 30 to 60 days of intense heat. After the summer heat, 15 days began to enter the beginning of autumn solar term, and 30 days began to enter the summer solar term. After the midsummer solar term, we will bid farewell to summer completely. At this time, the temperature will turn cold, and then the climate will gradually change from cold to cold, and it will be winter in a while.