Planning for the weather is a good way to make your trip to Isle aux Coudres relaxing and enjoyable, especially when you’re splurging. The hottest months are usually July and August with an average temp of 60°F, while the coldest months are January and February with an average of 16°F. The snowiest months in Isle aux Coudres are March, February, January, and April, with each month seeing an average of 161 inches of snowfall.