Weather will likely play an important role when you plan your trip to Grande Cache, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually July and August, with an average temperature of 11°C, while the coldest months are December and February, with an average of -11°C. The snowiest months in Grande Cache are January, March, February and December, with each month seeing an average of 13 cm of snowfall.