December in Coquitlam averages a daily high of 5.2°C with nights around 0.9°C. Expect roughly 18.8 wet days totalling 260.2mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Coquitlam is July–August.
Based on PORT MOODY GLENAYRE, BC CA (7.3km), 1995–2024. 18 years of December data.