July in Prince Rupert is the cloudiest month of the year. In July, the weather in Prince Rupert is typically warm. Average daily high temperature in July is about 15 degrees above zero. On average, Prince Rupert has 17 rainy, 6 cloudy, 5 partly cloudy, and 3 sunny days in July. The rains are usually heavy. July as well as January, February, March, and April is considered the most uncomfortable time to visit Prince Rupert.