July in Campbell River is the sunniest and the warmest month of the year. In July, the weather in Campbell River is typically warm. Average daily high temperature in July is about 23 degrees above zero. On average, Campbell River has 14 sunny, 9 rainy, 6 partly cloudy, and 2 cloudy days in July. The rains are usually heavy. July as well as August is considered the most comfortable time to visit Campbell River.