Taking into account the local weather in Tres Piedras is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually July and June with an average temp of 63°F, while the coldest months are January and December with an average of 24°F. The snowiest months in Tres Piedras are January, March, November, and December, with each month seeing an average of 10 inches of snowfall.