Will leaving a firearm in freezing temperatures for hours in my car damage it?

I work in a hospital or clinic every day, places where firearms are not allowed, so I am forced to leave it in my car. Do freezing temperatures damage or mess up the gun/lube/ammunition in any way? Especially if it is every day.I live in Michigan and winter is coming.I suppose I can ask the same question about the very hot temperatures in summer.Thanks. via /r/CCW http://ift.tt/2y9VUyN