December in Bronnoysund is the windiest month of the year. In December, the weather in Bronnoysund is typically cold. Average daily high temperature in December is about 1 degree above zero. On average, Bronnoysund has 15 rainy, 8 snowy, 4 sunny, 2 cloudy, and 2 partly cloudy days in December. The rains are usually heavy. December as well as March, April, May, and June is considered the most uncomfortable time to visit Bronnoysund.