December in Gander is the windiest and the cloudiest month of the year. In December, the weather in Gander is typically freezing. Average daily high temperature in December is about zero. On average, Gander has 10 cloudy, 10 partly cloudy, 6 snowy, 3 rainy, and 2 sunny days in December. The snowfalls are usually heavy. December as well as March, April, May, and October is considered the most uncomfortable time to visit Gander.