Afternoon heat in Lorraine beats that of 78% of Canadian towns
On a normal January night the air cools to about −13.5°C. Seasons differ by 40°C, from the coldest nights to the warmest afternoons. Precipitation is plentiful here, more than falls on 74% of Canadian towns. Homes need heating from October to April, the months averaging under 10°C.
These are not Lorraine’s own readings: ECCC keeps no normals there, so the page uses Montréal Trudeau (Airport), 22 km south.
A year in Lorraine at a glance
Each month’s typical high and low, in °C.
What stands out about Lorraine’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Lorraine feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
146 frost days and 121 days above 20°C a year
Frost comes from October to April; in January almost every night freezes. Some 12 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
1,041 mm of precipitation in a typical year
The most falls in October, the least in February. About 122 days a year bring 1 mm or more.
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 Lorraine
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. That means homes here need less heating than 62% of Canadian towns.
Living with Lorraine’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Plant out after about 29 April; the first frost of autumn usually arrives near 14 October, leaving roughly 167 days without frost.
Warm afternoons without cold nights, 17–27°C and 8°C or more, mark May, Jun, Jul, Aug and Sep.
Parks & trails →Wind chill falls below −20 on about 40 days a year: cover skin and dress in layers.
A humidex above 30 marks about 50 days in a normal year.
For blizzards, floods and wildfire, turn to Lorraine’s hazards page.
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 | 22 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, 31 km |
How Lorraine 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
Nearby places read from a different ECCC location (places on Lorraine’s own would show the same figures). The nearest places to Lorraine with figures are 10–21 km away.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Lorraine Montréal Trudeau (Airport) | 26.7°C | −13.5°C | 1,041 mm |
| Terrebonne 10 km · L'Assomption | 26.6°C about the same | −16.0°C 2.5°C colder | 1,041 mm |
| Sainte-Sophie 21 km · Lachute | 26.5°C about the same | −14.7°C 1.2°C colder | 1,178 mm |
Lorraine 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 |
Two years in three, January’s average lands within 3.0°C of normal, against the steadier June
Over 1991–2020, March saw both −26.9°C (1992) and 25.8°C (2012), the widest span of any month.
Where Lorraine’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s 1991–2020 Canadian Climate Normals for Montréal Trudeau (Airport), the nearest location with a full year of temperatures.
- Comparisons: Canada’s towns and neighbourhoods of 2,500+ (no city totals, no reserves), each through its own nearest 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 Lorraine’s climate
How warm does Lorraine get in summer?
Summer peaks in July: a typical afternoon reaches 26.7°C.
How cold does Lorraine get in winter?
Midwinter means January, when a typical night reaches −13.5°C.
How much rain and snow does Lorraine get?
The yearly total is about 1,041 mm. October gets 103 mm, the most of any month; February gets 66 mm, the least.
How long does snow stay on the ground?
Roughly 101 days a year start with snow cover of 1 cm or more.
Are these figures for Lorraine itself?
No. ECCC measures normals at Montréal Trudeau (Airport), not in Lorraine; the page uses the nearest it has.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Lorraine →
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).