Climate Insights for Coquitlam

The climate in Coquitlam is cool. The average annual temperature is 10°C and approximately 2534mm of precipitation falls per year. Coquitlam receives a notable amount of rainfall throughout the year, including during its driest month. Coquitlam is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, June. The coldest months are December, February, January, when temperatures can drop to 1°C. Snowfall occurs from January to December, with around 150cm accumulating over the season.

Temperatures in Coquitlam vary considerably across the year, with a 23°C difference between the coldest and warmest months. August is the warmest month, though highs remain moderate at 24°C with a mean of 18°C. December is the coolest month, with minimum temperatures around 1°C and an average of 3°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows. The sharpest temperature change occurs between September and October, with a 5°C shift in average temperatures.

Coquitlam is a very wet location, receiving approximately 2534mm of precipitation annually, which averages out to around 211mm per month. The wettest month is November, averaging 395mm of rainfall. January and December also tend to see above-average precipitation. The driest month is July, with just 46mm. That's 350mm less than November, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Snowfall is a regular feature from January to December, with around 150cm accumulating over the season. December typically sees the most snow at around 47cm.

Coquitlam is relatively calm, with an average annual wind speed of 10km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 11km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 9km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.

It is currently spring in Coquitlam, which began on March 20, 2026. Coquitlam is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 24°C, while the coldest stretch bottoms out in December near 1°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Coquitlam is during July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 18°C with modest rainfall averaging 53mm per month. By contrast, December can be quite cold with temperatures dropping to 1°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Coquitlam based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.