Average Temperature in Montreal by Month

Montreal has a humid continental climate, classified as Dfb in the Köppen system. The warmest month is July with an average high of 26°C, while the coldest month is January with lows dropping to -14°C. The annual temperature range of 40°C is typical of continental climates with distinct seasons.

The driest month is September with only 10 rain days and 98mm of precipitation. For travellers, September through to the following month typically offers the best balance of warm temperatures and dry conditions. Average humidity ranges from 65% to 65% throughout the year.