December in Port Coquitlam is the windiest and the coldest month of the year. In December, the weather in Port Coquitlam is typically cold. Average daily high temperature in December is about 2 degrees above zero. On average, Port Coquitlam has 10 cloudy, 9 rainy, 5 sunny, 5 partly cloudy, and 2 snowy days in December. The rains are usually heavy. December as well as January, February, March, and April is considered the most uncomfortable time to visit Port Coquitlam.