December in Charlottetown is the windiest month of the year. In December, the weather in Charlottetown is typically freezing. Average daily high temperature in December is about 1 degree above zero. On average, Charlottetown has 13 rainy, 12 snowy, 5 cloudy, and 1 sunny day in December. The rains are usually heavy. December as well as April, May, and November is considered the most uncomfortable time to visit Charlottetown.