Photo: Laval_City_Hall.JPG : Jean-Philippe Boulet derivative work: MTLskyline · CC BY 3.0Afternoon heat in Laval beats that of 78% of Canadian towns
January mornings start at about −13.5°C. Its yearly rain and snow top those of 74% of Canadian towns. From frozen January to warm July, readings climb 40°C. Windshields need scraping on about 146 mornings a year, the days the air reaches 0°C or below.
These are not Laval’s own readings: ECCC keeps no normals there, so the page uses Montréal Trudeau (Airport), 12 km south.
A year in Laval at a glance
Each month’s typical high and low, in °C.
What stands out about Laval’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Laval 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
From October to April frost is routine, and in January it comes on almost every night. On about 12 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
1,041 mm of precipitation in a typical year
October is the wettest month and February the driest. About 122 days a year bring 1 mm or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Snowfall: about 217 cm in a normal year
Expect snow from October to April, with about 52 cm in January, the snowiest month.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Laval
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
ECCC sums, over the year, how many degrees each day’s average falls short of 18°C. By this count, homes here need less heating than 62% of Canadian towns.
Living with Laval’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
Seedlings can go out once the average last frost, around 29 April, has passed; autumn’s first, near 14 October, ends a season of about 167 days.
The comfortable months for a day outside, highs of 17–27°C and nights of 8°C or more: May, Jun, Jul, Aug and Sep.
Parks & trails →Plan for about 40 days a year with a wind chill below −20.
A humidex above 30 marks about 50 days in a normal year.
Thirty-year normals hide the storms and the extremes: the hazards page has Laval’s risks.
Flood & hazards →ECCC’s normals location: Montréal Trudeau (Airport)
Behind the 1991–2020 normals for Montréal Trudeau (Airport) are 3 stations, which ECCC combines into one record.
| Distance from the town | 12 km south |
| 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'Assomption, 36 km |
How Laval compares
Against the 2,611 Canadian towns and neighbourhoods of 2,500 or more, each read from its own normals location; the dots are the other locations those towns use in Quebec.
Nearby towns’ climate
The nearest places on a normals location of their own: those that share Laval’s would only repeat its figures. The one place listed is 17 km from Laval, the nearest with figures.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Laval Montréal Trudeau (Airport) | 26.7°C | −13.5°C | 1,041 mm |
| Terrebonne 17 km · L'Assomption | 26.6°C about the same | −16.0°C 2.5°C colder | 1,041 mm |
Laval 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 |
Two years in three, January’s average lands within 3.0°C of normal, against the steadier June
Each bar spans a month’s coldest and warmest readings over thirty years; March’s run from −26.9°C in 1992 to 25.8°C in 2012.
Where Laval’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the Canadian Climate Normals, 1991–2020, at Montréal Trudeau (Airport) (the closest location with all twelve months of temperatures).
- Comparisons: a pool of Canadian towns and neighbourhoods of 2,500 or more, read alike; whole cities and reserves stay out of it.
- Not on this page: hours of sunshine, missing from the 1991–2020 normals, and a height correction: the town has no elevation on file.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Laval’s climate
How warm does Laval get in summer?
Afternoons average 26.7°C in July, the warmest time of year.
How cold does Laval get in winter?
At its coldest, in January, the normal low is −13.5°C.
How much rain and snow does Laval 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?
On about 101 days a year the ground keeps at least 1 cm of snow.
Are these figures for Laval itself?
They are borrowed from Montréal Trudeau (Airport), the nearest place to Laval where ECCC publishes 1991–2020 normals.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Laval →
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).