Planning for the weather is an important factor for making your trip to Sherbrooke a success, especially when you're splurging. The hottest months are usually July and August, with an average temperature of 17°C, while the coldest months are January and February, with an average of -6°C. The snowiest months in Sherbrooke are December, January, February and November, with each month seeing an average of 30 cm of snowfall.