Midwinter lows in Varennes sink below those of 75% of Canadian towns
High summer brings afternoon highs near 26.6°C. Rain or snow is most frequent in October and least in February. Counting rain and snow together, it is wetter than 74% of Canadian towns. About 122 days a year bring 1 mm of precipitation or more.
The nearest ECCC normals location to Varennes is L'Assomption, 15 km north, and every figure on this page is its.
A year in Varennes at a glance
Each month’s typical high and low, in °C.
What stands out about Varennes’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Varennes feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
161 frost days and 119 days above 20°C a year
The frost season runs October to May, and January freezes nearly every night. Deep cold, under −20°C, comes on about 24 nights a year.
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
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
ECCC’s L'Assomption normals leave out precipitation and snow; both come from Montréal Trudeau (Airport) here, 34 km away.
217 cm of snow in a typical year
The snow season runs October to April; January brings the most, about 52 cm.
Snowfall by month
Centimetres
Heating a home in Varennes
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Degree days add up how far each day’s mean temperature falls below 18°C over a year.
Living with Varennes’s climate
What the normals mean for a garden, a day outside and the depth of winter.
For long days outdoors, Jun, Jul, Aug and Sep bring highs of 17–27°C and lows of 8°C or more.
Parks & trails →Roughly 44 days a year feel colder than −20 in the wind.
About 49 days a year feel above 30 on the humidex.
Storms, floods and heat waves sit outside these normals; Varennes’s hazards page covers them.
Flood & hazards →ECCC’s normals location: L'Assomption
L'Assomption is one of the 450 places where ECCC publishes 1991–2020 normals.
| Distance from the town | 15 km north |
| Station altitude | 21 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Precipitation from | Montréal Trudeau (Airport), 34 km |
| Coldest reading, 1991–2020 | −40.0°C |
| Hottest reading, 1991–2020 | 36.2°C |
| Average wind | 10.0 km/h on average, most often from the south-west |
| Next-nearest location | Montréal Trudeau (Airport), 34 km |
How Varennes 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 Varennes whose figures come from another normals location. Distances here run 17–20 km: that is how far the nearest places with figures are from Varennes.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Varennes L'Assomption | 26.6°C | −16.0°C | 1,041 mm |
| Saint-Marc-sur-Richelieu 17 km · Fleury | 26.0°C 0.6°C cooler | −14.8°C 1.2°C milder | 1,109 mm |
| Saint-Bruno-de-Montarville 18 km · L'Acadie | 26.6°C about the same | −13.6°C 2.4°C milder | 1,041 mm |
| Longueuil 18 km · Montréal Trudeau (Airport) | 26.7°C about the same | −13.5°C 2.5°C milder | 1,041 mm |
Varennes weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −5.9°C | −16.0°C | −10.9°C | 86 mm | 52 cm |
| February | −4.0°C | −14.8°C | −9.4°C | 66 mm | 47 cm |
| March | 1.8°C | −8.3°C | −3.2°C | 77 mm | 37 cm |
| April | 10.8°C | 0.1°C | 5.5°C | 90 mm | 15 cm |
| May | 19.2°C | 7.2°C | 13.2°C | 86 mm | 0 cm |
| June | 24.3°C | 12.4°C | 18.4°C | 84 mm | 0 cm |
| July | 26.6°C | 14.8°C | 20.7°C | 91 mm | 0 cm |
| August | 25.5°C | 13.7°C | 19.6°C | 94 mm | 0 cm |
| September | 21.1°C | 9.2°C | 15.2°C | 89 mm | 0 cm |
| October | 13.0°C | 3.2°C | 8.1°C | 103 mm | 1 cm |
| November | 5.4°C | −2.7°C | 1.3°C | 84 mm | 16 cm |
| December | −1.9°C | −10.2°C | −6.1°C | 92 mm | 48 cm |
| Year | 11.3°C | 0.7°C | 6.0°C | 1,041 mm | 217 cm |
March: −29.5°C at its coldest, 26.0°C at its warmest
From one year to the next, January’s average typically shifts by 3.1°C around its normal of −10.9°C, the widest of any month, while June’s shifts by 1.0°C.
Where Varennes’s numbers come from
Averages over 30 years, not a forecast.
- Normals: 1991–2020 normals for L'Assomption from ECCC’s climate data site, the nearest location with every month of temperature.
- Other locations: precipitation and snowfall come from the nearest location that publishes all twelve months of them, as named above.
- Comparisons: the towns and neighbourhoods of 2,500+ across Canada, each on its nearest normals location, without the city totals or the reserves.
- Not on this page: sunshine, absent from every 1991–2020 location, and an altitude correction, for want of the town’s own elevation.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Varennes’s climate
How warm does Varennes get in summer?
The year’s warmest days come in July, with highs averaging 26.6°C.
How cold does Varennes get in winter?
January nights average −16.0°C, the coldest of the year.
How much rain and snow does Varennes get?
The year adds up to 1,041 mm. October is the peak month (103 mm) and February the low one (66 mm).
Are these figures for Varennes itself?
Only indirectly: the readings are made at L'Assomption, outside Varennes.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Varennes →
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).