When will spring come?

Around the beginning of April. The time of spring is different every year. There is a strict definition in meteorology, that is, the average daily temperature for five consecutive days passes 10℃ and is lower than 22℃, which is regarded as spring, and the first day of five days is spring.

From the meteorological point of view, China belongs to the monsoon climate zone, and spring is the period of alternating winter and summer monsoon, so the cold air and warm and humid air flow are changing, and they do not give in to each other. In the southern region, a cold air intrudes every three to five days in spring, and meets with the southwest warm and humid airflow, forming rainy weather. But in northern China, there is still little rain and drought.

Climatic characteristics:

In spring, the northern hemisphere of the earth began to tilt towards the sun, receiving more and more direct sunlight, so the temperature began to rise. In spring, plants begin to sprout and grow, and many flowers bloom. Hibernating animals wake up, many animals with eggs for the winter hatch, and birds begin to migrate, leaving the wintering ground for breeding grounds.

Many animals are in estrus during this period, so China also calls spring the season of "the revival of everything". Because hot air began to move northward, while cold air often lingered, in addition, the temperatures of land, water and air all rose at different speeds.

From the meteorological point of view, China belongs to the monsoon climate zone, and spring is the period of alternating winter and summer monsoon, so the cold air and warm and humid air flow are changing, and they do not give in to each other.

In the southern region, a cold air intrudes every three to five days in spring, and meets with the southwest warm and humid airflow, forming rainy weather. Spring is rainy season in many places in southern China, but it is rainy and dry in northern China. There are often strong storms in Europe and tornadoes in North America.