All tires have a temperature range they like to work in to give you their best performance. Summer tires like it hot, all-season tires like all things moderate and, of course, winter tires like it cold.
As temperatures drop below 7 C, however, the winter tire develops more grip, the all-season tire loses grip and the summer tire is just about useless.
As we approach November, when temperatures in the morning will be just above freezing, you can bet that the pavement will be very cold. Winter tires have rubber compounds formulated to stay soft and pliable for better traction in cold weather, something that all-season tries don't have.
If cost is a consideration, remember that your winter tires wear less in cold weather than all-season tires. All-season tires wear considerably faster when driven in winter. A Swiss auto club study showed that total tire costs for a sedan after five years were less when the car switched between winter and summer tires. Check out our tire specials.