What kind of pronoun is snowy?

The Word 'snowy' is not a pronoun. The Word 'snowy' is an adjective, a Word that describes a noun (a snowy mountain, a snowy night).

The Word 'snowy' is the adjective form of the noun 'snow', a Word for a thing.

A pronoun is a Word that takes the place of a noun in a sentence. The pronoun that takes the place of the noun 'snow' is it.

Example: The snow has been falling all day. It is getting pretty deep.