Visiting local bars in Grand Rapids is more fun when you know what the weather holds. These temperatures and rainfall averages can help you decide the best time for bar-hopping. The hottest months are usually July and August, with an average temperature of 20°C, while the coldest months are February and January, with an average of -2°C. The snowiest months in Grand Rapids are January, March, February and November, with each month seeing an average of 29 cm of snowfall.