December in Brampton is the windiest and the cloudiest month of the year. In December, the weather in Brampton is typically freezing. Average daily high temperature in December is about zero. On average, Brampton has 14 cloudy, 9 snowy, 6 rainy, and 2 sunny days in December. The snowfalls are usually moderate. December as well as March, April, October, and November is considered the most uncomfortable time to visit Brampton.