When is the hottest in summer?

The hottest time in summer is dog days. "Three volts" refers to the first, middle and last three volts, which is from mid-July to mid-August every year. After the summer solstice, although the days are getting shorter and the nights are getting longer, the days are longer than the nights in a day. Every day, the ground absorbs more heat than it emits, and the temperature near the ground is getting higher every day. During the "three volts" period, the heat absorbed by the ground is almost less than the heat emitted, and the weather is the hottest. After that, the heat absorbed by the ground began to be less than the heat emitted by the ground, and the temperature gradually decreased. Therefore, the hottest time of the year generally appears in the "dog days" from the summer solstice.

As for the hottest solar term, summer solar term is the hottest solar term in a year. The reason why it is extremely hot during the "Great Summer" is that since the beginning of summer, the heat absorbed from the ground sun during the day is more than that emitted at night, and the heat keeps accumulating. During summer, accumulated heat reaches its peak, so summer is the hottest. First, second, it's the hottest day of the year. Although it is already beginning of autumn in dog days, it is still very hot, so it is also called "autumn tiger". Because it is very hot in the dog days, it is called "dog days".