April in Fort Nelson is the rainiest month of the year. In April, the weather in Fort Nelson is typically cold. Average daily high temperature in April is about 6 degrees above zero. On average, Fort Nelson has 13 cloudy, 12 rainy, 3 sunny, and 2 partly cloudy days in April. The rains are usually light. April as well as January, February, November, and December is considered the most uncomfortable time to visit Fort Nelson.