Which is the hottest, first, middle and last? Why?

"Three-nine cold, midriff fever" means that the hottest day in a year belongs to the dog days, and "midriff" is the hottest day in the dog days. After the last day, the weather became cool.

So why is it the hottest among volts? First of all, because the surface humidity becomes higher after the decline, the ground absorbs more heat every day, emits less heat, and accumulates heat on the surface, so it gets hotter every day. When entering the alto, the heat accumulated on the ground reaches the highest value, and the weather is the hottest.

Moreover, there is much rain in summer, so the humidity in the air is relatively high. We all know that the specific heat capacity of water is much larger than that of air, so what does this mean? This means that the heat on the earth's surface will gradually accumulate, so that the heat will never dissipate and the temperature will naturally rise day by day. This causes a temperature every day, and the temperature index rises linearly.

After entering the last day, the weather is getting colder, it is cooler in the morning and evening, and it is still hot at noon, and each region will be different. Because the last stage is after beginning of autumn, even the so-called "autumn tiger" is hot during the day and cool in the morning and evening.

So we must be careful not to expose our bodies to the scorching sun at midnight. When I was a child, I often played outside with bare arms in the middle of the night, and I felt very cool. But when I get home at night, I enjoy the bitterness, because a layer of skin on my back can be wiped off by hand. Now that I think about it a little, I'm glad I recovered later.