Photo: Khayman · CC BY-SA 3.0Summer arrives in force in Sainte-Thérèse, hotter than in 78% of Canadian towns
January mornings start at about −13.5°C. The seasons are far apart: from a winter night to a summer afternoon the average spans 40°C. Precipitation is plentiful here, more than falls on 74% of Canadian towns. Comfortable outdoor weather lasts from May to September, with highs of 19–27°C.
Borrowed figures: Sainte-Thérèse has no normals station, so these come from Montréal Trudeau (Airport), 21 km south.
A year in Sainte-Thérèse at a glance
Each month’s typical high and low, in °C.
What stands out about Sainte-Thérèse’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Sainte-Thérèse 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. 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
About 1,041 mm of rain and snow 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 Sainte-Thérèse
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
The count adds up, day by day, how far the mean temperature falls short of 18°C. A house here needs less heating than 62% of Canadian towns.
Living with Sainte-Thérèse’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
The frost-free stretch runs from about 29 April to about 14 October, some 167 days in a normal year.
The comfortable months for a day outside, highs of 17–27°C and nights of 8°C or more: May, Jun, Jul, Aug and Sep.
Parks & trails →Count on some 40 days a year when the wind makes it feel below −20.
The air feels heavier than 30 on the humidex for about 50 days a year.
A typical year is calm by definition; Sainte-Thérèse’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 | 21 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, 37 km |
How Sainte-Thérèse 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-Thérèse’s would only repeat its figures. Sainte-Thérèse has few close neighbours with figures, so the list reaches 13–21 km out.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Sainte-Thérèse Montréal Trudeau (Airport) | 26.7°C | −13.5°C | 1,041 mm |
| Sainte-Anne-des-Plaines 13 km · L'Assomption | 26.6°C about the same | −16.0°C 2.5°C colder | 1,041 mm |
| Saint-Jérôme 21 km · Lachute | 26.5°C about the same | −14.7°C 1.2°C colder | 1,178 mm |
Sainte-Thérèse 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 |
January strays furthest from its normal year to year, by 3.0°C; June the 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 Sainte-Thérèse’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: every Canadian town and neighbourhood of 2,500 or more, each read from its own nearest location; city totals and reserves are left out.
- 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 Sainte-Thérèse’s climate
How warm does Sainte-Thérèse get in summer?
On a normal day in July the thermometer climbs to 26.7°C, the warmest of the year.
How cold does Sainte-Thérèse get in winter?
Winter bottoms out in January, with lows near −13.5°C.
How much rain and snow does Sainte-Thérèse get?
Precipitation totals 1,041 mm a year, with October the wettest month (103 mm) and February the driest (66 mm).
How long does snow stay on the ground?
Count on about 101 days of snow cover a year, 1 cm or deeper.
Are these figures for Sainte-Thérèse itself?
The figures are ECCC’s for Montréal Trudeau (Airport); Sainte-Thérèse has no normals station.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Sainte-Thérèse →
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).