Will paper mache be fine left in below zero weather?

Recently the weather has been around -10 or so. If paper mache were to be left outside, will it be fine? Just want some reassurances

Let’s say, a paper mache piggy bank was left in a mail box, will it freeze and then become soggy after it is returned to room temperature? Let’s also assume the time the paper mache is left inside the mail box is unknown…So, would you risk it? Is there even a risk of damage to the paper mache project?