Planning for the weather is a good way to make your trip to Las Piedras relaxing and enjoyable, especially when you're splurging. The hottest months are usually September and October, with an average temperature of 26°C, while the coldest months are July and June, with an average of 24°C. The rainiest months in Las Piedras are February, January, December and March, with each month seeing an average of 424 mm of rainfall.