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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 ·
The live forecast above shows Montreal’s current temperature and short-term trend. For the 7‑day stretch, expect a classic late‑winter rhythm: cold nights around –10 °C and daytime highs near freezing, with occasional snow flurries off the St. Lawrence River.
What does the St. Lawrence do to Montreal weather?
The river acts as a moisture source, feeding lake‑effect clouds and light snow during northerly winds. That keeps Montreal a few degrees milder than inland suburbs on winter nights, but also adds humidity. The seasonal transition through March brings a mix of rain and snow, with daytime highs slowly climbing toward 2 °C by the third week.
How reliable are 14‑day or 30‑day outlooks for Montreal?
Mid‑range forecasts (weather montreal 14 days and montreal weather 30 days) give broad temperature tendencies but lose precision after 7 days. For planning, the 7‑day and 15‑day outlooks from Environment Canada are the most trusted. Hourly detail is best checked day‑of, as fronts can shift timing.
What is the best time to visit Montreal for mild weather?
Late May through September brings daytime highs of 20–28 °C and low humidity. July and August are warmest, but June and September offer fewer crowds and comfortable conditions for walking the Old Port.
Does Montreal get dangerous cold snaps?
Yes – arctic air can push temperatures below –30 °C for a day or two, usually in January. Wind chill warnings are issued by Environment Canada. Check our weather warning page for current alerts.
Are temperature readings on this page in Celsius or Fahrenheit?
All temperatures are given in degrees Celsius (montreal weather celsius). For a quick conversion, –6 °C is about 21 °F; 30 °C is about 86 °F. The live forecast above can be toggled to montreal weather in fahrenheit on some providers.
Sources
For a broader look at conditions across the country, visit our Canada weather hub. Compare Montreal’s pattern with Ottawa weather or Toronto weather to see how the river corridor shapes each city’s winter chill.