What are the natural phenomena in spring?

In spring, the temperature gradually rises, the weather gradually warms up, the ice and snow begin to melt, and the spring breeze blows on the body and feels very warm; However, the weather is changeable in spring, and sometimes it rains in Chun Xue and Chun Xue, which is not good for crops. The air is humid in spring, which is a rainy season. "Spring rain is as expensive as oil", which makes wheat seedlings grow and seeds germinate, especially crops and flowers. ...