When is the winter solstice of 202 1? What is the general temperature in winter from solstice?

At present, people are most concerned about whether the solstice days will become longer and longer after winter. As far as the past is concerned, the winter solstice has the shortest day and the longest night. After this day, the days began to get longer and longer. So, when is the winter solstice of 202 1? What is the general temperature in winter from solstice? Let's take a look at it with me!

When is the winter solstice of 202 1?

The winter solstice of 202 1 is 65438+February 2 1.

Speaking of the solstice in winter, everyone must be familiar with it. Because this solar term is the first of the nine winters, everyone attaches great importance to it. In the Gregorian calendar, it usually passes around 65438+February 22, when the solar calendar reaches 270 degrees. Astronomically speaking, the winter solstice is defined as the beginning of winter in the northern hemisphere. The solar term begins in the beginning of winter, and the winter solstice is in winter. On this day, the sun reaches the top of the Tropic of Cancer and then returns. This day is the shortest day and the longest night in the northern hemisphere all year round, and there is night in the Arctic Circle. In the southern hemisphere, on the contrary, the longest day is the shortest, and the Antarctic circle also has extreme days. The solstice in winter is also a traditional festival in China, commonly known as the Winter Festival, which is as long as the Festival and as young as 2008.

What is the general temperature in winter from solstice?

Judging from the winter solstice temperature, the winter solstice temperature in higher places in the north and northwest is generally below zero, and the average temperature in the northeast should be around MINUS 7 degrees; The average temperature from Jianghuai to the north of Daba Mountain is also below zero. However, the average temperature in most parts of the south is about 7 degrees, and the temperature in some high-altitude areas is generally low, while the temperature in the valley is high, and the temperature in the valley south of western Sichuan is above 10 degrees from winter to Sunday. There is also a "winter-free zone" in South China, especially in Hainan. The lowest average temperature in winter is around 20 degrees. Even if there is a high temperature of more than ten degrees, it will not last for three days, and it will pick up again soon.

Why do the days get longer after the solstice in winter?

After the winter solstice, the days in many areas gradually become longer. The reason is that on the day of winter solstice, the sun turns directly to the tropic of Capricorn. At this time, the northern hemisphere gets the least sunlight, the light receiving surface of the earth is biased towards the southern hemisphere, and the light receiving area of the northern hemisphere reaches the minimum. At the same latitude in the northern hemisphere, the sunshine time is the shortest all year round, so the winter solstice is the shortest day of the year. After the winter solstice, the direct sunlight gradually moves from the Tropic of Cancer to the Tropic of Cancer, until the direct sunlight reaches the Tropic of Cancer from the summer solstice. Daylight is the longest day in a year. As a result, the direct sunlight approaches the tropic of Capricorn again, and it goes on and on. Therefore, after the winter solstice, the days gradually get longer.