Longueuil (QC) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Longueuil.
Climate overview of Longueuil
Longueuil, Quebec, Canada, experiences significant temperature variation throughout the year. Summers bring daytime highs of 28°C (82°F) in July, while winters cool to -4°C (25°F) in January.
The city receives considerable rain/snowfall, with around 1166 mm (46 in) annually. October is the wettest month. It has warm summers and very cold winters. The most sunshine falls in July, with an average of 9.1 hours of daily sunshine.
Longueuil Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Longueuil - and find the best time to visit.
Monthly Temperature in Longueuil
Depending on the time of the year, temperatures range from comfortable to very cold in Longueuil. Typically, average maximum daytime temperatures range from a comfortable 28°C (82°F) in July to a very cold -4°C (25°F) in the coolest month, January.
Nights vary from 16°C (61°F) in July to around -14°C (7°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Longueuil
Longueuil has a relatively rain/snowy climate with high precipitation levels, averaging 1166 mm (46 in) of rain/snowfall annually. Precipitation levels in Longueuil remain relatively steady throughout the year. October has the most rain, with 115 mm (4.5 in) over 13 days. In the driest month February, this drops slightly to 72 mm (2.8 in), making the city's climate fairly predictable. For more details, please visit our Longueuil Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Longueuil
For those who appreciate different seasons, Longueuil serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 9.1 hours of sunshine daily, and embrace the darker days in December, offering only 2.7 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Water Temperature in Longueuil
The mean water temperature over the year ranges from 3°C (37°F) in February to 21°C (70°F) in August.
Water temperature over the year
Humidity in Longueuil by Month
The relative humidity is high throughout the year in Longueuil.
The city experiences its highest humidity in December, reaching 71%. In May, the humidity drops to its lowest level at 51%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Longueuil
The mean wind speed varies between 5 m/s (10 knots) and 7 m/s (14 knots) throughout the year. It is lowest in June, July, August and September and highest during January, February, March and December. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Longueuil
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, June, July, August and September
- Warmest weather: July and August
- Most sunshine: July
- Best for swimming: August and September.
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -14°C (7°F).
Frequently asked questions about the climate in Longueuil
What is the best time to visit Longueuil?
May, June, July, August and September typically offer the most optimal weather in Longueuil. In contrast, January, February, March, April, November and December tend to have less optimal conditions. Longueuil has warm summers and very cold winters.
What temperatures can I expect in Longueuil?
Daytime highs range from -4°C (25°F) in January to 28°C (82°F) in July. Nighttime lows range from -14°C (7°F) to 16°C (61°F). Temperatures vary considerably through the year.
How much rain does Longueuil get?
Annual rainfall is around 1166 mm (46 in). October is the wettest month with 115 mm (4.5 in), while February is the driest with 72 mm (2.8 in).
How sunny is Longueuil?
Longueuil receives around 2,042 hours of sunshine per year. July is the sunniest month with 272 hours, while December is the cloudiest with just 80 hours. Overall, Longueuil enjoys abundant sunshine.
Longueuil 3-Day Forecast
Longueuil on the map
Longueuil is highlighted - select any city to see its climate.
Popular this month
Where to go in August - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
The 5 most beautiful lakes in Canada
Explore Canada's stunning lakes: Lake Louise, Lake Superior, Maligne Lake, Emerald Lake, and Lake Okanagan, each offering unique beauty and activities.
Canoeing the south Nahannii
The South Nahanni in the northwest of Canada is one of the most impressive wilderness rivers in the world. Canoeing the south Nahanni is something you must add to your bucket list.
See Polar Bears in Churchill Canada
Thousands of bears gather at the small town of Churchill. In the evening the northern lights give a light show against the dark evening sky. An unforgettable experience.
Banff National Park
Snowy mountains, clear blue lakes and green forests make Banff National Park a wonderful bucket list destination. The pristine wilderness is a mecca for walkers.