Getting an idea of what to expect from the weather in Saint-Bernard-sur-Mer is important when planning your trip. 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 -9°C. The snowiest months in Saint-Bernard-sur-Mer are March, February, January and April, with each month seeing an average of 409 cm of snowfall.