If you live in a place where the temperature gets down to freezing for weeks at a time, or if you tend to get a lot of snow each winter, then you should consider getting a set of winter tires.
Winter tires use a different formula of rubber, so they get better grip than other tires when it is cold out. They have deeper treads and little cuts that combine to keep slush out of the treads but retain packed snow, which boosts friction in snowy or icy conditions.