Summer tires are the most popular type of tire in Europe, and have the best performance available in the dry and wet. As these tires have poor performance in the snow and ice they should not be used in extreme winters.
All season tires are designed to be left on your vehicle year round, and while they don't perform as well as a summer tire in the dry and wet, or a winter tire in the snow, they're an excellent choice for people who want year round piece of mind.
Winter tires, sometimes called snow tires, perform best in colder winter conditions, and offer significant improvements in the cold wet conditions over summer tires, and improved snow and ice performance compared to all season tires.