When to Switch to Winter Tires in Canada
Transport Canada and TRAC cite a sustained daytime temperature near 7°C as the common benchmark for switching to winter tires. Here is a general overview of the reasoning.
Deciding when to switch to winter tires is a common question for Canadian drivers. Both Transport Canada and the Tire and Rubber Association of Canada provide general guidance that the switch should be based on sustained temperature rather than the first snowfall.
The 7°C Benchmark
Industry guidance from TRAC notes that most all season tire compounds begin to lose flexibility when daytime highs stay consistently at or below 7°C. Winter tire compounds are designed to remain flexible in cold temperatures, which is the primary reason winter tires are recommended for the cold season in Canada.
Typical Timing Across Canada
Actual timing varies year to year. In much of the Prairies, sustained cold usually arrives in October. In Ontario and Quebec it often arrives in late October or early November. In coastal British Columbia and parts of Atlantic Canada, the transition tends to be later and more gradual. Monitor your local forecast and make the change before a prolonged cold snap.
Switching Back in Spring
The same benchmark applies in reverse. Winter tires used in warm weather wear faster because their softer compounds are not designed for high pavement temperatures. Plan the spring changeover once daytime highs are consistently above about 7°C.
This article offers general information. Consult your vehicle owner manual and a qualified tire professional when planning a seasonal changeover.