Photo: Jeangagnon · CC BY-SA 4.0Precipitation in Brossard tops that of 74% of Canadian towns: 1,041 mm a year
The depth of winter brings overnight lows near −13.6°C. Expect the most rain and snow in October and the least in February. In July, afternoons here are warmer than in 70% of Canadian towns. Frost comes on about 149 days a year, so leave time to clear the car.
ECCC publishes no normals for Brossard itself; the figures are those of L'Acadie, 21 km south-east.
A year in Brossard at a glance
Each month’s typical high and low, in °C.
What stands out about Brossard’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Brossard feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
149 frost days and 124 days above 20°C a year
Frost comes from October to April; in January almost every night freezes. On about 15 nights a year the air falls below −20°C.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
About 1,041 mm of rain and snow a year
About 122 days a year bring 1 mm or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
ECCC’s L'Acadie normals leave out precipitation and snow; both come from Montréal Trudeau (Airport) here, 23 km away.
217 cm of snow in a typical year
Expect snow from October to April, with about 52 cm in January, the snowiest month.
Snowfall by month
Centimetres
Heating a home in Brossard
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
A heating degree day is one degree of shortfall below 18°C for one day, summed over the year.
Living with Brossard’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
The comfortable months for a day outside, highs of 17–27°C and nights of 8°C or more: Jun, Jul, Aug and Sep.
Parks & trails →Count on some 36 days a year when the wind makes it feel below −20.
The humidex tops 30 on about 50 days a year: muggy days to plan around.
Ice storms, floods and heat waves are risks, not averages: they are on Brossard’s hazards page.
Flood & hazards →ECCC’s normals location: L'Acadie
L'Acadie is one of the 450 places where ECCC publishes 1991–2020 normals.
| Distance from the town | 21 km south-east |
| Station altitude | 44 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Precipitation from | Montréal Trudeau (Airport), 23 km |
| Coldest reading, 1991–2020 | −32.5°C |
| Hottest reading, 1991–2020 | 36.1°C |
| Average wind | 11.4 km/h on average, most often from the west |
| Next-nearest location | Montréal Trudeau (Airport), 23 km |
How Brossard compares
Placed among 2,611 Canadian towns and neighbourhoods of 2,500+, each on its nearest normals location; each dot is another location used in Quebec.
Nearby towns’ climate
Places around Brossard whose figures come from another normals location.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Brossard L'Acadie | 26.6°C | −13.6°C | 1,041 mm |
| Vieux Greenfield Park 3.6 km · Montréal Trudeau (Airport) | 26.7°C about the same | −13.5°C about the same | 1,041 mm |
| Iberville 3.6 km · L'Acadie | 26.6°C about the same | −13.6°C about the same | 1,041 mm |
Brossard weather by month
Average daily high and low, mean temperature, rain and snow (as water) and snowfall by month, 1991–2020.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −4.3°C | −13.6°C | −9.0°C | 86 mm | 52 cm |
| February | −2.9°C | −12.7°C | −7.8°C | 66 mm | 47 cm |
| March | 2.6°C | −6.7°C | −2.1°C | 77 mm | 37 cm |
| April | 11.1°C | 0.7°C | 5.9°C | 90 mm | 15 cm |
| May | 19.5°C | 7.8°C | 13.7°C | 86 mm | 0 cm |
| June | 24.2°C | 13.2°C | 18.7°C | 84 mm | 0 cm |
| July | 26.6°C | 15.5°C | 21.1°C | 91 mm | 0 cm |
| August | 25.3°C | 13.9°C | 19.6°C | 94 mm | 0 cm |
| September | 21.4°C | 9.7°C | 15.6°C | 89 mm | 0 cm |
| October | 13.6°C | 4.1°C | 8.9°C | 103 mm | 1 cm |
| November | 6.1°C | −1.7°C | 2.2°C | 84 mm | 16 cm |
| December | −0.7°C | −8.6°C | −4.7°C | 92 mm | 48 cm |
| Year | 11.9°C | 1.8°C | 6.8°C | 1,041 mm | 217 cm |
A January here can run warm or cold, its average moving by about 2.9°C; the steadiest month is August
March has the widest record range, −28.7°C in 2003 to 25.4°C in 2012; the tick on each bar is the month’s normal.
Where Brossard’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the Canadian Climate Normals, 1991–2020, at L'Acadie (the closest location with all twelve months of temperatures).
- Other locations: precipitation and snowfall come from the nearest location that publishes all twelve months of them, as named above.
- Comparisons: all Canadian places of 2,500 or more except city totals and reserves, each read the same way.
- Not on this page: a sunshine figure (ECCC published none for 1991–2020) and any lapse-rate correction for height, as the town has no elevation here.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Brossard’s climate
How warm does Brossard get in summer?
Highs reach 26.6°C on an average July day; no month is warmer.
How cold does Brossard get in winter?
At its coldest, in January, the normal low is −13.6°C.
How much rain and snow does Brossard get?
Precipitation totals 1,041 mm a year, with October the wettest month (103 mm) and February the driest (66 mm).
Are these figures for Brossard itself?
No: Brossard has no normals location, so the figures come from L'Acadie, the nearest with 1991–2020 normals.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Brossard →
Adapted from Statistics Canada (Census of Population 2021, population estimates 2025, 2021 census boundaries) under the Statistics Canada Open Licence; this does not constitute an endorsement by Statistics Canada. Neighbourhood names in some cities © OpenStreetMap contributors (ODbL).