You can plan your beach trip with this snapshot of year-round temperatures in Notre-Dame-du-Portage: The hottest months are usually July and August, with an average temperature of 15°C, while the coldest months are January and February, with an average of -8°C. The snowiest months in Notre-Dame-du-Portage are March, January, February and December, with each month seeing an average of 36 cm of snowfall.