Is it hot in the morning or afternoon in early autumn?

"Of course, beginning of autumn is very cool in the morning. As the saying goes: "In early autumn, it is freezing; Early autumn night, the heat kills cattle. "In early autumn, it will be very cold in autumn, and the temperature will drop rapidly, which is in obvious contrast with summer. If it is in late autumn, there will be a very hot time, which is what we call "autumn tiger"