Mont-Tremblant works year-round, though the two peak periods are ski season (December to mid-April) and summer (July–August). The ski season is the primary draw: the Laurentians receive an average of 350 cm of snow per year, and snowmaking covers the main trails. January and February typically have the best snow conditions but also the coldest temperatures (−20°C is not unusual). March can be excellent: warmer days, good snow, and slightly lower prices.
Summer is busy with families, hikers, and watersports enthusiasts. The festival calendar fills with events — a blues and jazz festival in August is the best-known. September and October bring spectacular autumn foliage and are arguably the most beautiful months, with smaller crowds and comfortable temperatures. The shoulder periods of May–June and November see the fewest visitors and the best accommodation deals.