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 zero. On average, Charlottetown has 13 cloudy, 7 partly cloudy, 5 rainy, 4 snowy, and 2 sunny days in December. The rains are usually heavy. December as well as April, May, October, and November is considered the most uncomfortable time to visit Charlottetown.