Sainte-Catherine has warmer summer afternoons than 78% of Canadian towns
Nights in January average −13.5°C. Seasons differ by 40°C, from the coldest nights to the warmest afternoons. It is a wet place: more rain and snow fall here than on 74% of Canadian towns. Heating does most of its work from October to April, in months below 10°C on average.
These are not Sainte-Catherine’s own readings: ECCC keeps no normals there, so the page uses Montréal Trudeau (Airport), 17 km north-west.
A year in Sainte-Catherine at a glance
Each month’s typical high and low, in °C.
What stands out about Sainte-Catherine’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Sainte-Catherine feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
Frost on 146 days, 20°C on 121
Frost comes from October to April; in January almost every night freezes. 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. 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
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 Sainte-Catherine
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Each day the mean sits under 18°C adds its shortfall; a year’s total is its heating degree days. Over a year, a home here needs less heating than 62% of Canadian towns.
Living with Sainte-Catherine’s climate
What the normals mean for a garden, a day outside and the depth of winter.
On average the last spring frost comes around 29 April and the first autumn frost around 14 October: about 167 frost-free days between.
The outdoor season by the averages is May, Jun, Jul, Aug and Sep, with highs of 17–27°C and lows of 8°C or more.
Parks & trails →Bitter wind chill, under −20, comes on about 40 days a year.
Plan shade and water for about 50 days a year above 30 on the humidex.
Thirty years of averages say little about one bad storm; Sainte-Catherine’s hazards page does.
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 | 17 km north-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, 20 km |
How Sainte-Catherine 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
The nearest places on a normals location of their own: those that share Sainte-Catherine’s would only repeat its figures. No closer place has figures: this one lies 4 km from Sainte-Catherine.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Sainte-Catherine Montréal Trudeau (Airport) | 26.7°C | −13.5°C | 1,041 mm |
| Candiac 4.1 km · L'Acadie | 26.6°C about the same | −13.6°C about the same | 1,041 mm |
Sainte-Catherine 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 has run from −26.9°C to 25.8°C in thirty years
Year to year, January varies most (a standard deviation of 3.0°C around −9.2°C) and June least (1.1°C).
Where Sainte-Catherine’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: every place of 2,500+ in Canada but the city hubs and the reserves, each on its nearest ECCC location.
- Not on this page: a sunshine figure (ECCC published none for 1991–2020) and any lapse-rate correction for height, as the town has no elevation here.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Sainte-Catherine’s climate
How warm does Sainte-Catherine get in summer?
Summer peaks in July: a typical afternoon reaches 26.7°C.
How cold does Sainte-Catherine get in winter?
A typical January night falls to −13.5°C, the year’s low point.
How much rain and snow does Sainte-Catherine get?
Around 1,041 mm a year in all, from 103 mm in October down to 66 mm in February.
How long does snow stay on the ground?
In a normal winter there are about 101 days with at least 1 cm of snow lying.
Are these figures for Sainte-Catherine itself?
They are borrowed from Montréal Trudeau (Airport), the nearest place to Sainte-Catherine where ECCC publishes 1991–2020 normals.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Sainte-Catherine →
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).