Afternoon heat in Chomedey beats that of 78% of Canadian towns
The coldest hours of a January night bottom out at −13.5°C on average. Rain and snow together come to more here than on 74% of Canadian towns. The year swings widely: the coldest month’s nights and the warmest month’s afternoons are 40°C apart. Expect about 146 frosty starts a year, days when the air falls to freezing.
No ECCC station in Chomedey has 1991–2020 normals; the page reads Montréal Trudeau (Airport), 8.5 km south, instead.
A year in Chomedey at a glance
Each month’s typical high and low, in °C.
What stands out about Chomedey’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Chomedey 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
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
October is the wettest month and February the driest. 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
Snowfall: about 217 cm in a normal year
Snow falls from October to April, most of all in January (about 52 cm).
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Chomedey
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. In heating terms, homes need less heating than 62% of Canadian towns.
Living with Chomedey’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Frost usually lets go around 29 April and returns near 14 October, about 167 days apart.
Mild days and mild nights together (17–27°C by day, 8°C or more at night) belong to May, Jun, Jul, Aug and Sep.
Parks & trails →Bitter wind chill, under −20, comes on about 40 days a year.
About 50 days a year turn sultry, with the humidex past 30.
A normal year has no blizzard, flood or heat wave in it; Chomedey’s hazards page looks at those.
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 | 8.5 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, 38 km |
How Chomedey 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
Nearby places read from a different ECCC location (places on Chomedey’s own would show the same figures). No closer places have figures: these lie 20–24 km from Chomedey.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Chomedey Montréal Trudeau (Airport) | 26.7°C | −13.5°C | 1,041 mm |
| Terrebonne 20 km · L'Assomption | 26.6°C about the same | −16.0°C 2.5°C colder | 1,041 mm |
| Brossard 24 km · L'Acadie | 26.6°C about the same | −13.6°C about the same | 1,041 mm |
Chomedey 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 | −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: −26.9°C at its coldest, 25.8°C at its warmest
Year to year, January varies most (a standard deviation of 3.0°C around −9.2°C) and June least (1.1°C).
Where Chomedey’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s 1991–2020 Canadian Climate Normals for Montréal Trudeau (Airport), the nearest location with a full year of temperatures.
- 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, which none of ECCC’s 450 locations publishes for 1991–2020, and the town’s own height above sea level, so no figure is adjusted for altitude.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Chomedey’s climate
How warm does Chomedey get in summer?
Midsummer means July, with afternoons near 26.7°C on a typical day.
How cold does Chomedey get in winter?
The coldest nights come in January, averaging −13.5°C.
How much rain and snow does Chomedey 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?
About 101 days a year have 1 cm of snow or more on the ground.
Are these figures for Chomedey itself?
Not quite: they come from Montréal Trudeau (Airport), the closest ECCC normals location to Chomedey.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Chomedey →
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).