Ontario recommends four matching winter or all-weather tires for the best winter traction. Québec requires qualifying winter tires from December 1 through March 15 on most Québec-registered motor vehicles, with listed exceptions including heavy vehicles and trailers. Prepare before the deadline because cold weather can arrive earlier.
01 · WINTER DRIVING
Ontario and Québec have different rules
Ontario does not impose the same province-wide seasonal winter-tire mandate as Québec. The Ontario Driver’s Handbook recommends four winter or all-weather tires with the same tread pattern for the best winter traction.
In Québec, most motor vehicles registered in the province must use compliant winter tires from December 1 through March 15. The Québec government lists exceptions, including trailers, heavy vehicles and vehicles registered outside Québec. Rules can change, so check the official page for your vehicle and registration.
02 · WINTER DRIVING
Look for the winter symbol
A compliant Québec winter tire generally carries the three-peak mountain snowflake pictogram or is studded where permitted. M+S lettering by itself is not the same confirmation.
Transport Canada recommends at least 4 mm of winter tread for the safest winter driving. Québec’s guidance states a legal minimum of 1.6 mm and recommends at least 4.8 mm during winter. More tread helps clear snow and slush, but no tire replaces slower speeds and greater following distance.
03 · WINTER DRIVING
Install before the rush
Book before sustained cold weather and before Québec’s December 1 deadline. Early installation gives time to inspect tread, sidewalls, valves and wheels and avoids the busiest appointment period.
After installation, check cold pressure regularly. Temperature drops lower tire pressure, and a visual inspection cannot reliably show whether a tire is correctly inflated.
KEEP THIS HANDY
Quick checklist
- Confirm the rules for the province where the vehicle is registered
- Use four matching winter or approved all-weather tires
- Check for the three-peak mountain snowflake symbol
- Measure tread depth in several grooves
- Check cold pressure throughout winter
Sources and further reading
Specifications and regulations can change. Follow the current vehicle, tire-manufacturer and government guidance for your situation.