In rainy weather, use four numbers to make a solar term.

There is an old saying: "In summer, there is much thunder and little rain." Being in summer is the fourteenth of the twenty-four solar terms. Being in the heat is "out of the heat", that is, out of the heat. In summer, the direct point of the sun continues to move southward, the solar radiation weakens, the subtropical high also withdraws southward, the temperature gradually drops, and the summer heat gradually disappears. The arrival of summer means that the hot and difficult weather is over. During this period, the weather is still hot, but it has shown a downward trend.