What is summer and autumn?

Summer and autumn is the name of a season, and it also represents two connected seasons.

1. Summer, the second of the four seasons, is the hottest season in the northern hemisphere. China is used to long summer as long summer, and meteorological summer will be postponed to long Xia Hou for about 25 days. The ancients counted April, May and June of the lunar calendar as "summer"; Today, people regard June, July and August of the solar calendar as "summer".

Westerners generally say that the summer of solstice is divided into summer. The scientific division method is that the average temperature above 22℃ is "summer". Accordingly, when the average temperature keeps below 22℃, summer is over. In the southern hemisphere, 65438+February, 65438+ 10 and February are generally designated as summer.

2. Autumn is the third of the four seasons. Traditionally, China takes "beginning of autumn" in the 24 solar terms as the starting point of autumn. Entering autumn means that rainfall and humidity tend to decrease or decrease, and everything in nature begins to mature from lush. At present, the average temperature is often used to divide the four seasons, and the index is the average temperature in spring or autumn 10~22℃.

Early autumn is still in the heat, but it hasn't come out yet. This is the hottest, wettest and sultry period of the year. After late autumn, it is sunny during the day, cool and dry at night, with large temperature difference between morning and evening, less rain and insufficient water. Therefore, autumn dryness has become the main feature of late autumn.

Twenty-four solar terms memory formula:

The plum blossoms in the early spring are particularly bright, and the apricot blossoms after the rain are particularly fresh; Lulin thunder, butterfly dance between flowers at the vernal equinox.

When the kite was broken in Qingming Festival, Grain Rain was accompanied by tender tea and emerald, with long summer mulberry fruits like cherries, and a small man who cultivated silkworms.

Before mango seedlings enter the palace, the summer solstice rice and flowers are like white practice; Summer breeze urges early-maturing beans, and Chi Pan enjoys red lotus in hot summer.

Beginning of autumn knows how to make people fall asleep, and sunflowers smile in summer. The white dew returns to the geese, and the autumn equinox smells like osmanthus.

Cold dew vegetable seedlings are green, and the first frost reed flowers are floating all over the sky; Beginning of winter reported good news, reported three rewards, and light snow and goose feathers flew in pieces.

The snow is very cold, the plum blossoms are crazy in the wind, and the winter solstice is full of snow. Little cold wanderers are homesick, and they celebrate reunion at the end of the cold year.