Why is it so cold when spring comes?

The climate is changeable and the average temperature is not high. In meteorology, the beginning of spring is that the average temperature is above 10℃ for five consecutive days. The Gregorian calendar in the northern hemisphere is March-May, and in the southern hemisphere (such as Australia) it is September-165438+ 10.

In spring, the climate is warm and moderate, everything germinates, the climate is changeable, and it is warm and cold at first.

Spring has three months, starting in February and ending in May. In Europe and America, spring begins at the vernal equinox in China and ends at the summer solstice. In Ireland, February to April is designated as spring.

The workers set a standard for dividing the four seasons as consistent as possible with the natural scenery. Taking the five-day average temperature as the standard, it enters spring when the five-day average temperature passes 10℃ after winter, and when the temperature is higher than 22℃, it means late spring and early summer.

Beginning of spring is the beginning of spring. Since the Qin Dynasty, beginning of spring has been the beginning of spring in China. Beginning of spring is divided from astronomy, but in nature and people's minds, spring is warm and flowers are fragrant. Spring is growth, cultivation and sowing. In climatology, spring refers to the period when the average temperature is between 10℃ and 22℃.