January in Brantford is the snowiest, the windiest, the cloudiest, and the most freezing month of the year. In January, the weather in Brantford is typically freezing. Average daily high temperature in January is about 3 degrees below zero. On average, Brantford has 17 snowy, 11 cloudy, 2 sunny, and 1 partly cloudy day in January. The snowfalls are usually moderate.