Which month is the coldest in winter?

In the northern hemisphere, the winter solstice is in 65438+February, which is 65438+February in the Gregorian calendar. The winter solstice (about 65438+February 22) marks the shortest day and the smallest direct angle of the sun, so the cooling rate is the fastest. However, in fact, 65438+ 10 is the coldest time, which is the great cold solar term of the lunar calendar.

As the saying goes, walking on the ice in 3949. The great cold occurred just after March 9 and at the beginning of April 9. After the winter solstice, although the number of days increased day by day, the average length of days only increased by about one minute. At the same time, the angle between the direct angle of the sun and the ground gradually increases. The daily heat budget of the ground is still in deficit, which is not worth the loss, and the ground temperature continues to drop.