January weather forecast in Ontario

January in Ontario is the snowiest, the cloudiest, and the coldest month of the year. In January, the weather in Ontario is typically cold. Average daily high temperature in January is about 1 degree above zero. On average, Ontario has 12 cloudy, 6 sunny, 6 partly cloudy, 4 rainy, and 3 snowy days in January. The rains are usually moderate. January as well as December is considered the most uncomfortable time to visit Ontario.