Weather characteristics in early spring.

The biggest feature of beginning of spring's solar term climate is that it warms first and then cools: the temperature difference between day and night is large; Cold air activity is frequent. In spring, due to the invasion of cold air, the temperature is obviously reduced, and it is often sunny during the day, which makes people feel that the warm wind makes tourists intoxicated. In the morning and evening, cold air attacks people, which makes people feel that beginning of spring has reached the cold of late spring, but the temperature will not rise so fast. Besides, as the old saying goes, it is not recommended that you take off your winter clothes too early and put on bright spring clothes, especially for the elderly and children, and pay more attention to keep warm. Meteorological significance, the average daily temperature is higher than 5℃ for five consecutive days, and winter ends.

Beginning of spring is the first of the 24 solar terms. Standing means "start"; Spring represents warmth and growth. Twenty-four solar terms were originally formulated on the basis of "variable stars". When the bucket handle of the Big Dipper points to the shade, it is beginning of spring. At present, solar terms are determined according to the longitude of the sun. When the sun reaches longitude 3 15, it will be the beginning of spring, and the festival will be held from February 3 to 5 of the Gregorian calendar every year.