Montréal-Ouest has warmer summer afternoons than 78% of Canadian towns
Midwinter brings lows of about −13.5°C. The seasons are far apart: from a winter night to a summer afternoon the average spans 40°C. Counting rain and snow together, it is wetter than 74% of Canadian towns. Wet days, with 1 mm of rain or snow or more, come about 122 times a year.
Read at Montréal Trudeau (Airport), 8.0 km west: ECCC’s normals for 1991–2020.
A year in Montréal-Ouest at a glance
Each month’s typical high and low, in °C.
What stands out about Montréal-Ouest’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Montréal-Ouest feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
About 146 frosts and 121 warm days a year
Frost comes from October to April; in January almost every night freezes. Some 12 nights a year drop under −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
The most falls in October, the least in February.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 217 cm of snow a 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 Montréal-Ouest
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Warm days count for nothing; each colder day adds how far its mean sits below 18°C. In heating terms, homes need less heating than 62% of Canadian towns.
Living with Montréal-Ouest’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.
Plan time outside for May, Jun, Jul, Aug and Sep: highs of 17–27°C and nights no colder than 8°C.
Parks & trails →The wind chill passes −20 on about 40 days in a normal year.
Humid heat, a humidex over 30, comes on about 50 days a year.
A typical year is calm by definition; Montréal-Ouest’s hazards page covers the exceptions.
Flood & hazards →ECCC’s normals location: Montréal Trudeau (Airport)
Montréal Trudeau (Airport) is a composite: ECCC joins 3 stations’ readings to make its 1991–2020 normals.
| Distance from the town | 8.0 km west |
| 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, 30 km |
How Montréal-Ouest 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
The nearest places on a normals location of their own: those that share Montréal-Ouest’s would only repeat its figures. The nearest place to Montréal-Ouest with figures is 13 km away.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Montréal-Ouest Montréal Trudeau (Airport) | 26.7°C | −13.5°C | 1,041 mm |
| Candiac 13 km · L'Acadie | 26.6°C about the same | −13.6°C about the same | 1,041 mm |
Montréal-Ouest weather by month
Month by month, 1991–2020: the usual high, low and mean, the rain and snow, and the 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 |
January varies most from one year to the next (3.0°C), June least
The thirty-year records stretch furthest in March: a low of −26.9°C in 1992 and a high of 25.8°C in 2012.
Where Montréal-Ouest’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: Canada’s towns and neighbourhoods of 2,500+ (no city totals, no reserves), each through its own nearest location.
- Not on this page: sunshine (no 1991–2020 normals exist for it) and any altitude adjustment, since there is no elevation for the town itself.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Montréal-Ouest’s climate
How warm does Montréal-Ouest get in summer?
The year’s warmest days come in July, with highs averaging 26.7°C.
How cold does Montréal-Ouest get in winter?
Winter bottoms out in January, with lows near −13.5°C.
How much rain and snow does Montréal-Ouest get?
Over twelve months, rain and melted snow come to 1,041 mm; the range runs from 66 mm in February to 103 mm in October.
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 Montréal-Ouest itself?
They are the normals for Montréal Trudeau (Airport), measured just outside Montréal-Ouest itself.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Montréal-Ouest →
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).