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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Canada Scene Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
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Trois-Rivières sees cold, snowy winters and warm, humid summers. As shown in the live forecast above, conditions shift quickly here at the confluence of the St. Lawrence and Saint-Maurice rivers, so checking the hourly outlook is wise before heading out.
What is the best time to visit Trois-Rivières?
Late May through early October offers the most comfortable weather for exploring the old town and riverside parks. July and August are the warmest months, with highs averaging 25°C, though humidity can make it feel stickier. For snowbirds and March-break travellers, February and March deliver reliable snow cover for winter sports, but pack a heavy parka—temperatures often dip below -15°C.
What should I pack for a trip to Trois-Rivières?
In summer, bring light layers, a rain jacket, and comfortable walking shoes for cobblestone streets. Winter demands insulated boots, a warm hat, gloves, and a windproof coat. Spring and fall are unpredictable; a fleece and waterproof shell will serve you well. If you’re driving, note that winter tires are mandatory in Quebec from December 1 to March 15.
How does Trois-Rivières weather compare to Montreal or Quebec City?
Trois-Rivières sits between both cities and shares their humid continental climate. It is slightly cooler than Montreal in summer and a touch milder than Quebec City in winter, but differences are small—within a degree or two on most days.
Is there a reliable 10-day forecast for Trois-Rivières?
Environment Canada provides a trustworthy weather trois rivières 10 days outlook, though accuracy drops after day seven. For same-day plans, check the weather trois rivières hourly updates, which are more precise for timing outdoor activities.
What about weather in nearby Shawinigan?
Shawinigan, about 30 minutes north, has a similar climate but tends to be a couple of degrees cooler due to its inland position. Snowfall is also slightly heavier there, so factor that in if you’re heading up the Saint-Maurice valley.