When is the long summer?

Long summer falls on May 5th or 6th of the Gregorian calendar.

Long summer is the seventh of the 24 solar terms and the first in summer. Long summer means the change of seasons, which means that the long summer is the official beginning of midsummer when the sun reaches 45 degrees of the yellow meridian, usually on May 5 or 6 of the Gregorian calendar every year. After the long summer, the temperature in southern China rose rapidly, and the rainfall and days of rainfall increased significantly.

It is an important solar term in the traditional lunar calendar in China, marking the beginning of summer. The origin of solar term and long summer can be traced back to ancient China. In ancient agricultural society, long summer was one of the solar terms that farmers were most concerned about. Because after the long summer, the weather becomes hot, the rain increases, and crops begin to grow, which is a very important time node for farmers. Therefore, the long summer is also called the demarcation point of "spring ploughing and summer sowing".

Climate change in long summer.

Temperature rise: After the long summer, the temperature rises gradually, and it will be hotter during the day than before. Especially in the south, because of the humid climate and high humidity, it feels sultry.

Increased rainfall: During the long summer, rainfall began to increase, especially in South China and Jiangnan. This is because at this time, the direct point of the sun gradually moved northward, and the upward movement of the air in the southern region strengthened, which led to the thickening of clouds and triggered rainfall.

Thunderstorm weather increases: After the long summer, thunderstorm weather will also increase. As the temperature rises, the air humidity increases, and the cold and warm air flows meet, which is easy to form thunderstorm weather.

Increased wind: In some areas, there will be strong winds in the long summer. This is because the cold air in the north goes south and meets the warm and humid air in the south, forming a cyclone storm system.