Rainfall is typically even more scarce during March and April, with an average of only 1 inch (2.5 centimeters) during each month.
May sees rainfalls increase, but showers typically take place later afternoon or night. Expect to see about 3 inches (7.5 centimeters) of total rain during May.
June is the beginning of the rainy season, with as much as 6 inches (15 centimeters) of rainfall. Travel in June and you could have a rainy day that keeps you off the beach.
July through November are consistently between 4 to 5 inches (10 to 12.5 centimeters) of rainfall each month, but often that can take place during one week. Your chances of a wash-out vacation increase during this period. Tropical storms, or even the occasional hurricane, can ruin a vacation.