Between the dry and wet season, there is a temperature change of around . This change is due mainly to the warm waters of the tropical Atlantic Ocean, which significantly modify cooler air moving in from the north and northwest. Coastal waters temperatures around the years are about in February to in August. The highest temperature ever recorded was at Arecibo, while the lowest temperature ever recorded was in the mountains at Adjuntas, Aibonito, and Corozal. The average yearly precipitation is .