March in Campbell River is the cloudiest month of the year. In March, the weather in Campbell River is typically cold. Average daily high temperature in March is about 7 degrees above zero. On average, Campbell River has 23 rainy, 4 cloudy, 3 sunny, and 1 partly cloudy day in March. The rains are usually heavy. March as well as January, February, April, and October is considered the most uncomfortable time to visit Campbell River.