Weather in Mont Tremblant changes significantly with each season and temperatures can range from an average of 10 °F in winter to an average of 74 °F in summer. The coldest month is January with average temperatures between 5 °F and 19 °F. People book vacation rentals in Mont Tremblant all year long. Many come during the winter season to enjoy the best skiing in North America and in the summer to take advantage of the many outdoor activities in Tremblant.