July in Port Coquitlam is the sunniest month of the year. In July, the weather in Port Coquitlam is typically warm. Average daily high temperature in July is about 20 degrees above zero. On average, Port Coquitlam has 23 sunny, 5 partly cloudy, and 3 rainy days in July. The rains are usually light. July as well as August is considered the most comfortable time to visit Port Coquitlam.