What are the phenological characteristics of the summer solstice solar terms?

Because the heat radiated from the sun to the ground is still more than the heat radiated from the ground to the air, and the temperature will continue to rise in the future, there is a saying that it is not too hot from summer to the sun. Although the sunshine duration from summer solstice is the longest, it is not the hottest time of the year. For the Yellow River in China and most of its northern areas, the highest monthly average temperature is July, followed by August and then June.

In most cases, during the "summer solstice" period, the middle and lower reaches of the Yangtze River and the Jianghuai basin are rainy and frequently rainstorm, which is easy to cause floods and even threaten people's lives and property. Attention should be paid to strengthening flood control work. After the summer solstice, the ground is heated strongly and the air convection is strong, and thunderstorms are often easy to form in the afternoon to evening. This kind of hot thunderstorm comes and goes, and the rainfall range is small.

Extended data

On the day of summer solstice, the direct position of the sun on the ground reaches the northernmost point of the year, almost directly to the Tropic of Cancer, which runs through Yunnan, Guangxi, Guangdong and Taiwan Province provinces from west to east. These four provinces and regions are the regions where the sun is at the center of the sky, the sun shadow is the shortest, the day is the longest and the night is the shortest, as the ancients said:

"The days are long, the shadows are short and extreme, so the summer solstice is called". At the same time, for the Tropic of Cancer and its northern areas, the summer solstice is also the highest day at noon in a year. At this time, the southern hemisphere is in the middle of winter.

Baidu encyclopedia-summer solstice