The best months to visit Puerto Rico are February and December. See monthly temperatures, rainfall and rain days (1991–2020 averages) to plan your trip.
Average daytime high and monthly rainfall in Puerto Rico: January 28°C / 43mm; February 27°C / 31mm; March 28°C / 41mm; April 28°C / 73mm; May 30°C / 108mm; June 31°C / 62mm; July 31°C / 69mm; August 31°C / 82mm; September 31°C / 128mm; October 31°C / 114mm; November 28°C / 105mm; December 28°C / 49mm.