May–June  Cool spring weather, nature coming back to life, and fewer visitors. A lovely season for cities and scenery, although the weather can still vary. |
July–August  | The mildest season, with long days and peak visitor activity. | Ideal for combining cities, nature, wildlife watching, and itineraries that extend farther out to sea. |
September–October  | Fall colors, superb light, and a quieter atmosphere. | A beautiful time for Charlevoix, Quebec City, the Saguenay, and forest scenery. |
November–April  | Full winter conditions and very limited cruise availability. | Not well suited to traditional cruises on the St. Lawrence. |