Taking the local weather in Grand Falls 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 February and January, with an average of -5°C. The snowiest months in Grand Falls are February, March, December and January, with each month seeing an average of 38 cm of snowfall.