Taking the local weather in Granby into account is an important factor for planning your visit, especially if you plan to spend your trip by the pool. The hottest months are usually July and August, with an average temperature of 14°C, while the coldest months are January and December, with an average of -8°C. The snowiest months in Granby are December, January, February and March, with each month seeing an average of 60 cm of snowfall.