Is it dry when it snows?

This is dry, because cold air is heavier when it meets hot air. When cold air meets hot air, convective snow begins to fall, causing a cold current including snowfall.

That is to say, it indicates the coming of winter, and the weather has become cold since then.

PS _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Haha, what we just learned is called applying what we have learned.