When should winter tires go on in Durham Region?
The usual rule is seven degrees, not the first snowfall. Below roughly seven degrees the rubber in an all-season tire stiffens and stops gripping properly, which is why the first cold rain of the season causes as many incidents as the first snow. Around Oshawa and Whitby that threshold typically arrives in late October or early November. Waiting for snow means booking in the same week as everyone else, and it means driving the run-up to that week on tires that have already stopped working properly.
