No, not on its own. Metaphor depends on context; how you use it makes it one.
the snow howled
A metaphor is simply using a word or phrase as a symbol for another word or phrase. A metaphor for ice might be glass.
rain
white as snow
Anita Carter and Hank Snow The Special Concenus Band, also Anita Carter and Hank Snow
Because snow is rather cold...
cold as there is snow
yes the live in snow and snow is cold
snow is really cold water it melts because it gets warm outside and snow can only be in cold areas
They are free from shoveling snow and their aching bones are free from Olde Man Winter.
It is a simile because it uses the word an. Haha, I had the excact same question on my grammer worksheet in school. \ / _
That is not a metaphor. "The snow was a dirty blanket over the parking lot" would be a metaphor. It is a figure of speech that compares two very different things- snow and a blanket.