Photo: Zoe1951 · Public domainAfternoon heat in Notre-Dame-de-l'Île-Perrot beats that of 78% of Canadian towns
On a normal January night the air cools to about −13.5°C. A year here swings 40°C from midwinter lows to midsummer highs. Its yearly rain and snow top those of 74% of Canadian towns. Comfortable outdoor weather lasts from May to September, with highs of 19–27°C.
Borrowed figures: Notre-Dame-de-l'Île-Perrot has no normals station, so these come from Montréal Trudeau (Airport), 16 km north-east.
A year in Notre-Dame-de-l'Île-Perrot at a glance
Each month’s typical high and low, in °C.
What stands out about Notre-Dame-de-l'Île-Perrot’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Notre-Dame-de-l'Île-Perrot 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. 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
Rain and melted snow: about 1,041 mm a year
October is the wettest month and February the driest. On about 122 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 217 cm of snow a 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 Notre-Dame-de-l'Île-Perrot
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. By this count, homes here need less heating than 62% of Canadian towns.
Living with Notre-Dame-de-l'Île-Perrot’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
From about 29 April to 14 October the garden is usually clear of frost, some 167 days.
Highs of 17–27°C with nights of 8°C or more come in May, Jun, Jul, Aug and Sep.
Parks & trails →Wind chill falls below −20 on about 40 days a year: cover skin and dress in layers.
Muggy heat with a humidex over 30 arrives on about 50 days a year.
Averages smooth over blizzards, ice storms, floods and heat waves; Notre-Dame-de-l'Île-Perrot’s hazards page covers the risks.
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 | 16 km north-east |
| 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 | Lachute, 44 km |
How Notre-Dame-de-l'Île-Perrot 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 Notre-Dame-de-l'Île-Perrot whose figures come from another normals location. Notre-Dame-de-l'Île-Perrot has few close neighbours with figures, so the list reaches 18–21 km out.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Notre-Dame-de-l'Île-Perrot Montréal Trudeau (Airport) | 26.7°C | −13.5°C | 1,041 mm |
| Saint-Lazare 18 km · Lachute | 26.5°C about the same | −14.7°C 1.2°C colder | 1,178 mm |
| Salaberry-de-Valleyfield 21 km · St-Anicet | 26.7°C about the same | −13.0°C 0.5°C milder | 1,047 mm |
Notre-Dame-de-l'Île-Perrot 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 |
The month with the widest range: March, −26.9°C to 25.8°C
Bars run from each month’s record low to its record high over 1991–2020; January is the month whose average wanders most from year to year (±3.0°C around −9.2°C), June the one that wanders least (±1.1°C).
Where Notre-Dame-de-l'Île-Perrot’s numbers come from
Averages over 30 years, not a forecast.
- Normals: Environment and Climate Change Canada’s 1991–2020 normals, Montréal Trudeau (Airport): the nearest of its locations with every month’s temperatures.
- Comparisons: all Canadian places of 2,500 or more except city totals and reserves, each read the same way.
- Not on this page: sunshine, not in ECCC’s 1991–2020 normals, and the effect of the town’s height, for which there is no figure.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Notre-Dame-de-l'Île-Perrot’s climate
How warm does Notre-Dame-de-l'Île-Perrot get in summer?
In July, the warmest month, the typical high is 26.7°C.
How cold does Notre-Dame-de-l'Île-Perrot get in winter?
Lows sink to −13.5°C on an average January night.
How much rain and snow does Notre-Dame-de-l'Île-Perrot get?
Count on roughly 1,041 mm a year, heaviest in October (103 mm) and lightest in February (66 mm).
How long does snow stay on the ground?
The ground is white, with 1 cm or more, on some 101 days a year.
Are these figures for Notre-Dame-de-l'Île-Perrot itself?
They are borrowed from Montréal Trudeau (Airport), the nearest place to Notre-Dame-de-l'Île-Perrot where ECCC publishes 1991–2020 normals.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Notre-Dame-de-l'Île-Perrot →
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).