Summer afternoons in Senneville are warmer than in 78% of Canadian towns
Deep winter brings January lows near −13.5°C. Precipitation is plentiful here, more than falls on 74% of Canadian towns. Winter and summer sit 40°C apart. An umbrella or a shovel earns its place on about 122 days a year with 1 mm or more.
The nearest ECCC normals location to Senneville is Montréal Trudeau (Airport), 17 km east, and every figure on this page is its.
A year in Senneville at a glance
Each month’s typical high and low, in °C.
What stands out about Senneville’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Senneville feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
146 frost days and 121 days above 20°C a year
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
About 1,041 mm of rain and snow a year
October brings the most rain and snow; February, the least.
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 Senneville
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. Over a year, a home here needs less heating than 62% of Canadian towns.
Living with Senneville’s climate
What the normals mean for a garden, a day outside and the depth of winter.
The frost-free stretch runs from about 29 April to about 14 October, some 167 days in a normal year.
Plan time outside for May, Jun, Jul, Aug and Sep: highs of 17–27°C and nights no colder than 8°C.
Parks & trails →Plan for about 40 days a year with a wind chill below −20.
Count on some 50 humid days a year with the humidex past 30.
A typical year is calm by definition; Senneville’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 | 17 km 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, 39 km |
How Senneville 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
Places around Senneville whose figures come from another normals location. Senneville has few close neighbours with figures, so the list reaches 14–21 km out.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Senneville Montréal Trudeau (Airport) | 26.7°C | −13.5°C | 1,041 mm |
| Kanesatake 14 km · Lachute | 26.5°C about the same | −14.7°C 1.2°C colder | 1,178 mm |
| Saint-Clet 21 km · St-Anicet | 26.7°C about the same | −13.0°C 0.5°C milder | 1,047 mm |
Senneville 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 |
From year to year, January moves by 3.0°C, more than any month, and June least
Bars run from each month’s record low to its record high since 1991. March spans the most, from −26.9°C (1992) to 25.8°C (2012).
Where Senneville’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s normals for Montréal Trudeau (Airport), 1991–2020, chosen as the nearest location with a full temperature record.
- Comparisons: all Canadian places of 2,500 or more except city totals and reserves, each read the same way.
- 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 Senneville’s climate
How warm does Senneville get in summer?
The year’s warmest days come in July, with highs averaging 26.7°C.
How cold does Senneville get in winter?
Winter bottoms out in January, with lows near −13.5°C.
How much rain and snow does Senneville get?
Measured as water, a year brings 1,041 mm: 103 mm in October, the wettest month, and 66 mm in February, the driest.
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 Senneville itself?
Only indirectly: the readings are made at Montréal Trudeau (Airport), outside Senneville.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Senneville →
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).