Longueuil (QC) Temperature by Month
Longueuil, Quebec, Canada has an average annual maximum temperature of 13°C (55°F), ranging from -4°C (25°F) in January to 28°C (82°F) in July. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Longueuil Monthly Temperatures
In Longueuil, temperatures differ significantly between summer and winter months. Nighttime lows reflect this range, dropping from 16°C (61°F) in July to -14°C (7°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Longueuil by month:
From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. July, the warmest month, averages 272 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Longueuil vs Canada
The map below shows the annual temperature across Canada. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Longueuil vs World: Temperature Compared
Longueuil's average annual maximum temperature is 13°C (55°F). To put that in context, here's how it compares to a few well-known destinations:
Lisbon, Portugal averages 21°C (70°F) annually — warm summers, mild winters, and rain mainly in the cooler months.
Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.
Beijing, China averages 20°C (68°F) annually, but with big seasonal swings — very cold winters and hot summers.
Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.
What Does the Temperature Feel Like in Longueuil?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In the cooler months, when temperatures drop below 10°C, high humidity makes the cold feel more cutting than it would in dry conditions.
In Longueuil, January is the coolest month, with average highs of -4°C (25°F) and humidity around 68% — considered high. In July, the warmest month, temperatures average 28°C (82°F) with 57% humidity — conditions that feel moderate. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Longueuil this rarely lasts long on the ground.
For more on Longueuil's weather — including monthly rainfall, sunshine hours, and humidity — visit our Longueuil climate page.
