When will the weather in Chengdu cool down?

It's time for the autumn tiger. If you watch the weather forecast, it will probably cool down on the Mid-Autumn Festival. It should be the last high temperature now. Will the Mid-Autumn Festival cool down? Once it starts to cool down, it will be relatively large, and then it will stay at 20 and 2 1 degree for a period of time. Some time ago, a meteorologist said that Chengdu will enter the autumn with meteorological significance at the end of September, that is, the high temperature will be below 22 degrees for five consecutive days. You can wear autumn clothes then. I have been paying attention to the weather and climate.