In January, the weather in Port Coquitlam is typically cold. Average daily high temperature in January is about 5 degrees above zero. On average, Port Coquitlam has 21 rainy, 5 sunny, 4 cloudy, and 1 partly cloudy day in January. The rains are usually heavy. January as well as February, March, April, and October is considered the most uncomfortable time to visit Port Coquitlam.