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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Canada Edition Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Lachine’s weather today, as shown in the live forecast above, brings a mix of sun and cloud with a chance of afternoon showers. The lakeshore breeze off Lac Saint-Louis keeps temperatures a few degrees cooler than inland Montreal, a pattern that sticks around through the week.
What’s driving today’s conditions for Lachine?
A weak trough moving across southwestern Quebec is responsible for the cloud build-up and the risk of a brief shower this afternoon. Winds from the southwest at 15 to 20 km/h will pick up near the water, and the humidex will stay modest. Overnight, skies clear and the low dips to around 12°C along the lakeshore.
How does Lachine’s location affect the forecast?
Sitting on the shore of Lac Saint-Louis, Lachine often sees slightly cooler afternoons than downtown Montreal weather or Dorval weather, especially when a southwesterly flow pushes lake air inland. The Lachine Canal corridor can also funnel wind, making the apparent temperature drop a degree or two. For the most up-to-the-minute details, check the Lachine weather hourly updates from Environment Canada.
Is the Lachine weather radar showing any storms?
The radar from Environment Canada currently indicates only light, scattered showers passing south of the island. No thunderstorm activity is expected for Lachine this afternoon. You can monitor the Lachine weather radar loop for real-time movement.
How does this compare to AccuWeather Lachine forecasts?
AccuWeather Lachine may show slightly different high/low numbers because it uses a proprietary model. For official warnings and hourly data, Environment Canada remains the authoritative source for Montreal weather and Lachine specifically.
Will the weekend be better for outdoor plans?
Yes, a ridge of high pressure builds in Friday night, bringing sunny skies and highs near 25°C Saturday. Lake breezes will still keep the shore a touch cooler than inland areas like Dorval weather, but overall it’s a pleasant stretch.
Sources
For broader conditions across the province, visit our Canada weather hub or check the latest Montreal weather page. If you’re heading east, our Dorval weather page has details for that lakeshore community. Stay aware of any sudden changes with the weather warning page.