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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 ·
For Montreal over the next 10 days, expect a shift from mild autumn conditions toward cooler, unsettled weather by mid-period. The live forecast above shows daytime highs near 12–15°C through the weekend, with rain likely Monday and Tuesday as a low-pressure system moves in from the Great Lakes region.
Will it rain a lot this week in Montreal?
Yes, the most significant precipitation arrives Monday evening into Tuesday, when a slow-moving system could drop 15–25 millimetres across the island and the broader St. Lawrence Valley. After that, skies clear but temperatures slip to single digits overnight, with highs struggling to reach 10°C by Thursday. For those checking Canada’s weather hub, this pattern mirrors a typical mid-October cool-down.
How cold will it get at night?
Overnight lows will dip to 2–5°C by the middle of the 10-day window, especially in outlying areas like Laval and the South Shore. Frost is possible in low-lying parts of the Montérégie region. If you’re looking at weather montreal 14 days or weather montreal 30 days outlooks, a gradual warming trend may return by the third week, but confidence is low this far out.
What is the weather in Montreal tomorrow?
Tomorrow will be partly sunny with a high near 14°C, turning cloudier by evening. A few showers may develop overnight ahead of the main rain system. Check the live forecast above for hourly updates.
Is the 10-day forecast accurate for Montreal?
Reliability is good for the first five days, then moderate for days 6–10. For longer-range planning, weather montreal 21 days or montreal weather 15 days outlooks are useful as trends but not for specific daily details.
Will it snow in Montreal in the next 10 days?
No snow is expected. Temperatures remain above freezing, with rain the only precipitation type. For winter conditions, see our weather warning page for alerts later in the season.