Taking the local weather in Deux-Montagnes into account can help you maximise your time at the pool during your trip. The hottest months are usually July and August, with an average temperature of 19°C, while the coldest months are January and February, with an average of -6°C. The snowiest months in Deux-Montagnes are January, February, December and March, with each month seeing an average of 60 cm of snowfall.