What are the meteorological criteria for entering winter?

The first day when the daily average temperature is lower than 10℃ for 5 consecutive days is the day when winter enters meteorologically.

The time is different in the northern and southern hemispheres. In the southern hemisphere, winter is in June, July, and August; in the northern hemisphere, winter is in November, December, and January. In China, winter starts from the beginning of winter and ends at the beginning of spring; Westerners generally call winter solstice to spring. Climatologically speaking, winter is considered winter when the average temperature falls below 10 degrees Celsius for five consecutive days.

The weather in winter is cold and blood circulation in various tissues of the human body is reduced. Many people are unwilling to move when they get home and get into bed or on the sofa. This is wrong. Blood circulation is slow and you feel colder. You can do some appropriate warm-up exercises at home, such as yoga, which is very soothing and the movements are light and slow, which can promote blood circulation and are suitable for doing at home.

Extended information:

Things to note when keeping warm in winter

1. The jacket is no bigger than the waist

As the saying goes, "Cold comes from the soles of the feet." , keeping warm in autumn and winter should start from the lower body. However, many coats only reach the waist, which results in the lower body not being kept warm. The temperature difference between the upper and lower body increases, causing poor blood circulation, which in turn makes it colder and colder. It is best to wear a jacket that goes through the waist, and it is also best to increase the thickness of the lower body clothing.

2. Clothes are wrapped too tightly

The air layer between each layer of clothes has a good effect of isolating cold air. If the clothes are wrapped tightly, the clothes will be sandwiched. There is less air between them, and the insulation effect is not obvious, making people feel colder. In addition, if the underwear is too tight, it will also affect the flow of lymph fluid and blood, making people colder.

3. Wear tight pantyhose with over-the-knee boots

This is a common outfit for many beauty-loving ladies in autumn and winter, but boots are not conducive to breathability and the moisture in the shoes It is not easy to evaporate, and it will easily loosen and deform after being worn for a long time, allowing cold air to leak in, causing cold legs and feet. In addition, tights are generally made of chemical fibers, which are not good at absorbing sweat and can cause foot odor.

4. Wearing the wrong socks

Winter cold protection and warmth must be comprehensive, and the ankle area cannot be ignored. However, if wearing socks that are too short, too thick, or have too tight cuffs cannot achieve this goal, it is recommended to wear stockings with appropriate thickness and loose and appropriate cuffs.

Baidu Encyclopedia - Winter

People's Daily Online - 5 major misunderstandings to avoid when keeping warm in winter