Summer arrives in force in Dorval, hotter than in 78% of Canadian towns
January mornings start at about −13.5°C. Rain and snow together come to more here than on 74% of Canadian towns. The wettest month is October; the driest is February. Warm coats and heating bills mark the months from October to April, when means dip under 10°C.
The nearest ECCC normals location to Dorval is Montréal Trudeau (Airport), 2.7 km north, and every figure on this page is its.
A year in Dorval at a glance
Each month’s typical high and low, in °C.
What stands out about Dorval’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Dorval feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
Frost on 146 days, 20°C on 121
The frost season runs October to April, and January freezes nearly every night. Deep cold, under −20°C, comes on about 12 nights a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
1,041 mm of precipitation in a typical year
Some 122 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
217 cm of snow in a typical year
From October to April snow is likely; January is the peak, at about 52 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Dorval
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
The total grows by a degree for every degree a day’s mean sits under 18°C. A house here needs less heating than 62% of Canadian towns.
Living with Dorval’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
The frost-free stretch runs from about 29 April to about 14 October, some 167 days in a normal year.
Afternoons of 17–27°C and nights of at least 8°C arrive in May, Jun, Jul, Aug and Sep.
Parks & trails →Expect around 40 days a year when the wind chill sinks below −20.
Expect around 50 sticky days a year with the humidex above 30.
Ice storms, floods and heat waves are risks, not averages: they are on Dorval’s hazards page.
Flood & hazards →ECCC’s normals location: Montréal Trudeau (Airport)
ECCC builds the Montréal Trudeau (Airport) normals from 3 stations’ records over 1991–2020, joined where one replaced another.
| Distance from the town | 2.7 km north |
| Station altitude | 36 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −31.8°C |
| Hottest reading, 1991–2020 | 36.6°C |
| Average wind | 15.4 km/h on average, most often from the west |
| Next-nearest location | L'Acadie, 36 km |
How Dorval compares
Compared with 2,611 towns and neighbourhoods of 2,500 or more across Canada; the dots mark the other normals locations in Quebec.
Nearby towns’ climate
The nearest places on a normals location of their own: those that share Dorval’s would only repeat its figures. Dorval has no close neighbour with figures; the nearest is 20 km away.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Dorval Montréal Trudeau (Airport) | 26.7°C | −13.5°C | 1,041 mm |
| Candiac 20 km · L'Acadie | 26.6°C about the same | −13.6°C about the same | 1,041 mm |
Dorval weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −5.0°C | −13.5°C | −9.2°C | 86 mm | 52 cm |
| February | −3.4°C | −12.4°C | −8.0°C | 66 mm | 47 cm |
| March | 2.4°C | −6.5°C | −2.0°C | 77 mm | 37 cm |
| April | 11.3°C | 1.1°C | 6.2°C | 90 mm | 15 cm |
| May | 19.4°C | 8.3°C | 13.9°C | 86 mm | 0 cm |
| June | 24.2°C | 13.8°C | 19.0°C | 84 mm | 0 cm |
| July | 26.7°C | 16.7°C | 21.7°C | 91 mm | 0 cm |
| August | 25.7°C | 15.6°C | 20.6°C | 94 mm | 0 cm |
| September | 21.1°C | 10.9°C | 16.0°C | 89 mm | 0 cm |
| October | 13.2°C | 4.5°C | 8.9°C | 103 mm | 1 cm |
| November | 6.1°C | −1.7°C | 2.3°C | 84 mm | 16 cm |
| December | −1.2°C | −8.7°C | −5.0°C | 92 mm | 48 cm |
| Year | 11.7°C | 2.3°C | 7.0°C | 1,041 mm | 217 cm |
March has run from −26.9°C to 25.8°C in thirty years
Year to year, January varies most (a standard deviation of 3.0°C around −9.2°C) and June least (1.1°C).
Where Dorval’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the closest ECCC location with twelve months of temperature normals, Montréal Trudeau (Airport), 1991–2020.
- Comparisons: Canadian towns and neighbourhoods of at least 2,500, each placed by its nearest location (city totals and reserves excluded).
- Not on this page: sunshine, absent from every 1991–2020 location, and an altitude correction, for want of the town’s own elevation.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Dorval’s climate
How warm does Dorval get in summer?
The warmest month is July, when afternoons average 26.7°C.
How cold does Dorval get in winter?
January nights average −13.5°C, the coldest of the year.
How much rain and snow does Dorval get?
The year adds up to 1,041 mm. October is the peak month (103 mm) and February the low one (66 mm).
How long does snow stay on the ground?
Snow lies on the ground for about 101 days in a normal year.
Are these figures for Dorval itself?
No, they come from Montréal Trudeau (Airport); ECCC keeps no 1991–2020 normals in Dorval itself.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Dorval →
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).