The best time to go to Dolbeau-Mistassini is during the summer months, from June to August, when the weather is warmest and most activities are available.During these months, the average daily temperatures range from 20°C to 25°C (68°F to 77°F), making it comfortable for outdoor exploration. The longer daylight hours also mean more time to enjoy the region's natural beauty, such as the shores of Lac Saint-Jean and the Mistassini River. This period is ideal for families looking to enjoy recreational activities like hiking, cycling along the Véloroute des Bleuets, or exploring local parks.Another excellent time to visit is in early autumn, specifically September, for a quieter experience. While temperatures begin to cool, averaging around 15°C (59°F), the fall foliage around the Saguenay–Lac-Saint-Jean region is particularly striking. This season is superb for couples seeking scenic drives, photography opportunities, and a more relaxed pace without the peak summer crowds.