Precipitation in Sainte-Pétronille tops that of 90% of Canadian towns: 1,216 mm a year
In January the night’s low is typically −16.6°C. Winter nights are cold: in January they are colder than in 79% of Canadian towns. Seasons differ by 42°C, from the coldest nights to the warmest afternoons. Wet days, with 1 mm of rain or snow or more, come about 142 times a year.
ECCC publishes no normals for Sainte-Pétronille itself; the figures are those of Lauzon, 4.0 km south.
A year in Sainte-Pétronille at a glance
Each month’s typical high and low, in °C.
What stands out about Sainte-Pétronille’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Sainte-Pétronille feels like
Each season’s and each month’s usual high and low, 1991–2020.
About 179 frosts and 95 warm days a year
From September to May frost is routine, and in January it comes on almost every night. Some 25 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
1,216 mm of precipitation in a typical year
July is the wettest month and March the driest.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 299 cm of snow a year
Expect snow from October to April, with about 77 cm in December, the snowiest month.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Sainte-Pétronille
90% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Warm days count for nothing; each colder day adds how far its mean sits below 18°C. That means homes here need more heating than 71% of Canadian towns.
Living with Sainte-Pétronille’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
Warm afternoons without cold nights, 17–27°C and 8°C or more, mark Jun, Jul, Aug and Sep.
Parks & trails →Averages smooth over blizzards, ice storms, floods and heat waves; Sainte-Pétronille’s hazards page covers the risks.
Flood & hazards →ECCC’s normals location: Lauzon
Every temperature, frost, snow and degree-day figure on this page is the 1991–2020 normal ECCC publishes for Lauzon.
| Distance from the town | 4.0 km south |
| Station altitude | 69 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −39.0°C |
| Hottest reading, 1991–2020 | 35.0°C |
| Next-nearest location | Ste-Foy (U. Laval), 17 km |
How Sainte-Pétronille 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 Sainte-Pétronille whose figures come from another normals location. Sainte-Pétronille has few close neighbours with figures, so the list reaches 13–17 km out.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Sainte-Pétronille Lauzon | 24.9°C | −16.6°C | 1,216 mm |
| Québec 13 km · Ste-Foy (U. Laval) | 25.1°C about the same | −15.6°C 1.0°C milder | 1,173 mm |
| Saint-Michel-de-Bellechasse 15 km · Saint Michel | 25.1°C about the same | −16.0°C 0.6°C milder | 1,216 mm |
Sainte-Pétronille 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 | −7.1°C | −16.6°C | −12.1°C | 80 mm | 62 cm |
| February | −5.0°C | −15.4°C | −10.1°C | 80 mm | 71 cm |
| March | 0.3°C | −9.2°C | −4.6°C | 78 mm | 51 cm |
| April | 7.8°C | −1.9°C | 3.3°C | 95 mm | 12 cm |
| May | 17.1°C | 5.3°C | 11.2°C | 98 mm | 0 cm |
| June | 22.3°C | 10.6°C | 16.6°C | 120 mm | 0 cm |
| July | 24.9°C | 13.7°C | 19.2°C | 129 mm | 0 cm |
| August | 23.8°C | 12.7°C | 18.2°C | 117 mm | 0 cm |
| September | 19.0°C | 8.2°C | 13.7°C | 123 mm | 0 cm |
| October | 11.0°C | 2.4°C | 6.8°C | 112 mm | 2 cm |
| November | 3.9°C | −3.6°C | 0.4°C | 84 mm | 24 cm |
| December | −3.4°C | −11.5°C | −7.8°C | 101 mm | 77 cm |
| Year | 9.6°C | −0.4°C | 4.6°C | 1,216 mm | 299 cm |
A January here can run warm or cold, its average moving by about 3.1°C; the steadiest month is August
Over 1991–2020, January saw both −39.0°C (1994) and 12.5°C (1996), the widest span of any month.
Where Sainte-Pétronille’s numbers come from
Averages over 30 years, not a forecast.
- Normals: 1991–2020 normals for Lauzon from ECCC’s climate data site, the nearest location with every month of temperature.
- 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 Sainte-Pétronille’s climate
How warm does Sainte-Pétronille get in summer?
Expect highs near 24.9°C in July, the hottest month on average.
How cold does Sainte-Pétronille get in winter?
A typical January night falls to −16.6°C, the year’s low point.
How much rain and snow does Sainte-Pétronille get?
Rain and snow, with snow counted as water, total 1,216 mm a year; July leads with 129 mm and March trails with 78 mm.
How long does snow stay on the ground?
The ground is white, with 1 cm or more, on some 143 days a year.
Are these figures for Sainte-Pétronille itself?
Only indirectly: the readings are made at Lauzon, outside Sainte-Pétronille.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Sainte-Pétronille →
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).