What does a slight cold mean today?

Today's slight cold means that today is a slight cold solar term.

A slight cold, as the name implies, is a cold to a certain extent, but it is not the coldest time, so it is called "slight cold". If it is extremely cold, it is the "Great Cold", that is, the last solar term in the 24 solar terms-the Great Cold Solar Term.

"It's hot in a slight cold day, but it's cold in a severe cold day", which means that it doesn't matter whether it's cold or not in a slight cold solar term, but it's still a little hot, because the severe cold behind it will be particularly cold. Similar agricultural proverbs include "slight cold, no cold and great cold".

Weather characteristics of slight cold solar terms

Slight cold usually occurs between February 9 and March 9, and agricultural proverbs also say "March 949, frozen pigs and frozen dogs", indicating that the weather is colder during the slight cold season.

The reason why the winter solstice is not the coldest in a year, but in the solar terms of slight cold and severe cold, is because the earth absorbs the heat of the sun during the day and releases a lot of heat at night.

In summer, the sun absorbs more heat and emits less heat, so there is a certain amount of heat accumulation every day. After a long time, there is more and more accumulated heat, most in dog days, so this period is the coldest.