Burnaby Weather FAQ

Burnaby receives approximately 1,200mm of annual precipitation, which is comparable to Vancouver but slightly less than North Shore communities like North Vancouver and West Vancouver, which can receive 1,500-2,000mm due to orographic lift from the mountains. The distribution varies across Burnaby itself, with Burnaby Mountain receiving 15-20% more precipitation than lower-elevation areas like Metrotown. Most rain falls between October and March, with November and December being the wettest months at around 170-190mm each. The summer months of July and August are remarkably dry, averaging only 36-37mm, making them ideal for outdoor activities.

Lower elevation areas of Burnaby average 20-30cm of total snowfall per winter season, though this varies significantly from year to year. Some winters bring virtually no accumulating snow, while others can deliver 50-80cm. Burnaby Mountain consistently receives more snow, often 50-60cm or higher, because of its 370-meter elevation. Snow events typically occur between December and February, with January being the most likely month. Most snowfalls melt within 2-4 days at lower elevations, though mountain areas can maintain snow cover for weeks during colder winters. The city's hilly terrain and limited snow removal equipment mean even 10-15cm can cause significant disruption to transportation.

July through early September offers the most reliable weather for visitors, with July and August being the driest and warmest months. During this period, daytime temperatures average 22-23°C with minimal rainfall, and you can expect clear skies on approximately 60-70% of days. Late May through June also provides excellent conditions with comfortable temperatures around 17-20°C and moderate rainfall. September extends summer-like weather with 19°C averages and only 51mm of rain. If you prefer cooler temperatures and fewer crowds, late April and May offer beautiful spring conditions with blooming flowers, though you should prepare for occasional rain showers. Winter visits from December through February require rain gear, as these months see 165-190mm of precipitation each.

Burnaby Mountain's elevation of 370 meters creates a distinct microclimate through several meteorological processes. Temperature decreases approximately 0.65°C per 100 meters of elevation gain, making the mountain 2-2.5°C cooler than sea-level areas year-round. This temperature difference determines whether precipitation falls as rain or snow during winter. The mountain also experiences orographic lift, where moist Pacific air rises over the terrain, cools, and releases additional precipitation. This process increases rainfall by 15-20% compared to lower Burnaby. During temperature inversions in winter, cold air settles in valleys while the mountain sits in warmer air above, occasionally reversing the typical temperature pattern. Wind speeds are also 20-30% higher on exposed mountain areas.

Modern weather forecasts for Burnaby achieve approximately 85-90% accuracy for next-day predictions and 70-75% accuracy for three-day forecasts, according to verification studies by Environment and Climate Change Canada. Accuracy decreases to around 60% for seven-day forecasts. The main challenges include predicting exact precipitation timing, distinguishing between rain and snow at middle elevations, and forecasting the precise track of Pacific storm systems. Microclimatic variations across Burnaby mean a single forecast cannot capture conditions everywhere simultaneously. Burnaby Mountain may experience snow while lower areas see rain, or coastal neighborhoods may have fog while inland areas are clear. For the most accurate information, consult forecasts that provide elevation-specific predictions and check multiple sources during uncertain weather patterns.

Burnaby typically enjoys good air quality most of the year due to Pacific Ocean winds that disperse pollutants. However, summer wildfire smoke has become an increasing concern since 2015. During major fire seasons, particularly in August and September, smoke from interior British Columbia or Washington State wildfires can blanket the region for days or weeks. The August 2018 smoke event saw Air Quality Health Index readings exceed 10 (very high risk) for over a week. These events are tracked by Environment Canada and regional air quality monitoring networks. During smoke events, sensitive individuals should limit outdoor activities, use HEPA air filters indoors, and monitor official air quality readings. Winter months occasionally see elevated particulate matter from wood-burning heating, particularly during temperature inversions that trap pollution near ground level.