Spring, short but sweet, arrives around the middle of May.
Summer (mid-June through mid-Sept) tends to be humid in Montreal, Quebec City, and other communities along the St. Lawrence River, and drier at the inland resorts of the Laurentides and the Cantons-de-l'Est. Intense but usually brief heat waves mark July and early August, but temperatures rarely remain oppressive in the evening.
Autumn (Sept and Oct) is as short and changeable as spring, with warm days and cool or chilly nights. Canadian maples blaze with color for weeks.
Winter brings dependable snows for skiing in the Laurentides, the Cantons-de-l'Est, and Charlevoix. After a sleigh ride or a ski run in Parc Mont-Royal, Montreal's underground city is a climate-controlled blessing. Snow and slush are more-or-less constantly present from November to March.