What is the difference between the first frost and the first rain?

The difference between the first frost and rain lies in the climate characteristics and precipitation forms.

The first frost and the first rain are two of the 24 solar terms, marking the change of seasons and the turning point of climate. The first frost refers to the sixteenth solar term in autumn. At the beginning of frost, the temperature gradually dropped, and frost began to appear on the ground, marking the late autumn and cold weather. Rain refers to the second solar term in spring, which generally appears around February 18 in Gregorian calendar. When it rains, the temperature rises gradually and the precipitation increases, which indicates that winter is coming to an end and spring is coming. The rainy season is often accompanied by the appearance of spring rain, which is beneficial to the growth of crops.