The dog days include four solar terms, namely, slight summer heat, great summer heat, beginning of autumn and early summer. At this point, the dog days have passed or come to an end, and the summer heat in early autumn will also end. The arrival of the hot summer also means entering the second half of the dry calendar. Summer is one of the 24 solar terms reflecting climate change.
Meteorological changes of summer solar terms
Summer is a solar term reflecting the temperature change. The original meaning of "going out" means "stopping" and "staying", and "going out in summer" means that the hot summer is coming to an end. As the height of the sun decreases, the heat it brings will also decrease.
The heat has gradually subsided. Although the summer heat is decreasing and the temperature will not suddenly rise, there will still be a short-term reheating weather during this period, and it has not started to cool down. It usually gets cold after a thousand years.
Refer to the above? Baidu encyclopedia-Chu Shu