October in Charlottetown is the rainiest month of the year. In October, the weather in Charlottetown is typically warm. Average daily high temperature in October is about 11 degrees above zero. On average, Charlottetown has 14 rainy, 7 sunny, 6 partly cloudy, and 4 cloudy days in October. The rains are usually heavy. October as well as April, May, November, and December is considered the most uncomfortable time to visit Charlottetown.