Taking into account the local weather in Loon Lake is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually July and August with an average temp of 60°F, while the coldest months are February and January with an average of 11°F. The snowiest months in Loon Lake are March, January, February, and April, with each month seeing an average of 16 inches of snowfall.