Puerto Rico's pleasant tropical climate is virtually seasonless, though temperatures are slightly higher from June to September; note it may be considerably cooler in the mountains. Rainfall varies around the island - heaviest in El Yunque, which receives up to 200 inches a year, and lightest in the southwest desert region, getting only 37 inches a year.

Hurricanes are so common in Puerto Rico that they got their name here; the English word for these storms with winds of over 75mph comes from the name of the Taíno god of malevolence, Jurakán (pronounced hu-ra-kan). Hurricane season runs June through November, when the weather is hottest and wettest, with the risk highest in September.