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St. Thomas Weather in May: Rain, Temperatures

St. Thomas weather in May
Average high temperature and rainfall in St. Thomas during May. © 2021 Scott S. Bateman

St. Thomas weather in May offers plenty of warm temperatures with only a slight increase in the risk of rain.

This eastern Caribbean cruise port is popular for great beaches and duty-free shopping. It also has some of the warmest weather in the Caribbean, especially from late spring through the summer.

St. Thomas Temperatures in May

The average high temperature in May is 88 degrees Fahrenheit or about 30 Celsius, according to the U.S. National Weather Service. The average low is 76 Fahrenheit or 23 Celsius.

The average daytime temperatures are about two degrees higher than the coolest months of the year, which are December, January and February. But the nighttime temperatures are four degrees warmer, which makes a big difference in water temperatures.

Water temperatures in May average about 80 degrees Fahrenheit or 26 Celsius. Average water temperatures stay between the daytime highs and nighttime lows. They will feel cooler in the early mornings and warmer in the afternoons.

St. Thomas travel guide | Cruise port tips | Shore excursions | Best beaches

Average Rainfall

February and March are the driest months of the year at St. Thomas with an average rainfall of about one and a half inches a month.

April has about twice as much rain at nearly three inches historically during the month, according to the U.S. National Weather Service. In May, rainfall usually climbs a little higher and stays around that level each month until September through November. The average then jumps to between five and six inches.

An average of three inches of rain during the month is about average for many Caribbean islands. It is usually not enough to ruin a vacation.

St. Thomas weather in May has some of the best weather of the year. Although the risk of rain is higher than winter and early spring, the warm temperatures should appeal to fans of beaches and other water activities.

• St. Thomas weather in January, February, March, April, May, June, July, August, September, October, November, December

Scott S. Bateman is a professional journalist who has traveled widely throughout the Caribbean and the Americas. He is the author of four books about cruising in the Caribbean, Alaska and Mexican Riviera.
April 29, 2021

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