For my money, investing in a good set of snow tires is a wise move. When you consider it lengthens the use of our summer tires, the cost difference is not that great. A combination of snows and summers should last about 4 years on average vs just summer/all weathers with same mileage, about 2 years.
Click below for article from Canadian Underwriter
Gap between Ontario drivers who see importance of winter tires and actually installing them