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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Civic Maple Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Check the live forecast above before heading out in Rimouski. Conditions along the St. Lawrence shift quickly, so the hourly and seven-day view gives you the clearest picture for planning your day or week.
What makes Rimouski’s weather different?
Rimouski sits on the south shore of the St. Lawrence River. The water moderates temperatures in spring and fall, but also brings more cloud and wind than inland areas. Winters are cold and snowy, with frequent squalls off the river. Summers are mild, rarely hot for long stretches.
What should I watch for in Rimouski this week?
Pay attention to wind direction and speed in the live forecast above. East or northeast winds often push cool air and fog ashore. Overnight lows can drop 5–10°C below daytime highs under clear skies. For a longer view, check the Rimouski weather 14 days and hourly details to spot changes early.
How does Rimouski weather compare to Montreal?
Montreal weather is warmer and less snowy on average because it’s inland and farther south. Rimouski stays cooler year‑round, especially in spring when the St. Lawrence is still cold. Winter wind chill is also more severe in Rimouski.
What causes the fog near Rimouski?
Marine fog forms when warm, moist air passes over the cold St. Lawrence. It’s most common in late spring and early summer, and can reduce visibility to under a kilometre. The live forecast above will show fog alerts when present.
Is Rimouski weather similar to Matane weather?
Yes, because both cities face the St. Lawrence. Matane weather tends to be slightly cloudier and windier due to its more exposed location. Temperatures are usually within a degree or two of each other, but check the hourly data for your exact town.
For a broader view of conditions across the country, visit our Canada weather hub. If you’re heading inland, Montreal weather or Ottawa Weather might be useful. For longer trips, see Weather 10 Days for Rimouski and other eastern Quebec locations.