Taking into account the local weather in Falmouth 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 65°F, while the coldest months are February and January with an average of 25°F. The snowiest months in Falmouth are January, March, November, and February, with each month seeing an average of 12 inches of snowfall.