October in Port Coquitlam is the rainiest month of the year. In October, the weather in Port Coquitlam is typically warm. Average daily high temperature in October is about 10 degrees above zero. On average, Port Coquitlam has 18 rainy, 6 sunny, 6 partly cloudy, and 1 cloudy day in October. The rains are usually heavy. October as well as January, February, March, and April is considered the most uncomfortable time to visit Port Coquitlam.