What do you mean, changing your face is faster than changing the weather?

Describe people's fickle. It is often said in our daily life that changing face is faster than changing the weather. Sometimes the weather changes quickly, but changing face faster is to highlight the rapidity of changing face, mainly to describe people's fickleness. Weather refers to the specific state of the atmosphere close to the surface in a short time in a certain area, while weather phenomena refer to various natural phenomena that occur in the atmosphere.