Taking into account the local weather in Lake Leelanau is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually August and July with an average temp of 64°F, while the coldest months are February and January with an average of 27°F. The snowiest months in Lake Leelanau are January, February, November, and December, with each month seeing an average of 14 inches of snowfall.