If you're hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in Metis-sur-Mer: 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 -7°C. The snowiest months in Metis-sur-Mer are March, January, February and November, with each month seeing an average of 37 cm of snowfall.