"The winter solstice is at the beginning of the month, and it will be cold in the new year." Why does the old farmer's prediction say it is more accurate than the weather forecast?

Discourse summarized based on relevant factors.

What does the number nine in the cold weather mean? What's the scientific explanation? In fact, it is a winter solar term. The ancients started counting the days to celebrate winter from the winter solstice. Every nine days is a nine-day period in the sense that after nine days, that is, after 81 days, spring will arrive soon.

The ancients thought winter was too long, so they called it "Nine Cold Days". In culture, "Nine Days" means the ultimate. Of course, "Nine Days" can also be understood as the "most" meaning, "Nine Cold Days". It's the coldest time of the year.

This year? Nine cold days? When does it start? In fact, it is not difficult. The date is consistent every year, starting from the winter solstice. This year's winter solstice falls on December 21st, and the day starts with "19th". From the first day of the lunar month, the weather will gradually get colder. ? Cold in 39?, and ? 3949 will freeze the dog to death? and other common sayings. This means that "三九" and "四九" are the coldest, and "三九" and "四九" will basically overlap with the Dahan and Xiaohan solar terms. Analyzing from the date level, the coldest time in the range of March 9th this year is From January 8th to 16th of the coming year, the range of the Fourth Nine is from January 17th to 25th.

Why are ?三九? and ?四九? the coldest? After the winter solstice, the time when the sun shines on the northern hemisphere is the shortest in the year, and the ground receives the least heat. At this time, the height of the sun will gradually increase, but the amplitude will then decrease. The light and heat brought during the day are more than dissipated at night. The "39" and "49" are the times with the least heat. The Siberian cold current enters and is the most active, so it is the coldest at this time. The difference between the north and the south is reflected in the time difference coverage. In the north, "39" is the coldest, and in the south, the coldest is "49". It was said a while ago that this year is the coldest winter. So how cold is this winter?

After entering winter and after the cold wave, the temperature is indeed lower than in previous years. In August, it was predicted that La Niña would occur in winter and reach its peak in winter.