When is the coldest month every year?

Generally speaking, in the northern hemisphere, the winter solstice in 65438+February is the coldest month of the year, that is, 65438+February in Gregorian calendar.

During the winter solstice, the earth runs on the ecliptic until the sun reaches 270 (the winter solstice), and the position where the sun directly hits the ground reaches the southernmost point of the year. The sun is almost directly on the tropic of Capricorn (also known as the winter solstice line), and the sun is most biased towards the northern hemisphere. The winter solstice is the shortest day in a year in the northern hemisphere. It absorbs the least heat from the sun, which is why the weather is cold.

After the winter solstice, the direct point of the sun gradually moved northward, the days in the northern hemisphere began to lengthen gradually, and the height of the sun gradually increased at noon. Climatically, during the winter solstice, the average temperature in the northwest plateau is generally below 0℃, and it is only about 6℃ to 8℃ in the south.

However, the influencing factors of temperature are complex, besides natural factors, they are also closely related to human factors, such as exhaust emissions and coal burning, which will cause temperature fluctuations, and the coldest months in different regions are also different.