Winter tires gain their advantage not only because they have superior tread patterns that are designed for traction on ice and snow, but because they employ softer rubber compounds to enhance grip. That means when it's cold, whether it's on dry pavement, snow, or slush, it'll outperform an all-season. This is also why winter tires are not suitable for summer, warm-weather driving, as their softer rubber and more open tread pattern will wear rapidly - when temperatures climb above 40 degrees regularly, swap them out for summer or all-season tires. Likewise, low-profile summer performance tires are terrible in cold temperatures. All-season tires compromise their winter ability in order to be used during the summer.