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Grand Cayman Weather in December: Rain, Temperatures

Grand Cayman weather in December
Average high temperature and rainfall for Grand Cayman in December. © 2023 Scott S. Bateman

The numbers don’t lie when it comes to Grand Cayman weather in December. Temperature are usually warm and the risk of rain is moderate.

Grand Cayman is the biggest and most popular of the Cayman Islands. It is a major destination for western Caribbean cruises partly because of attractions that include Seven Mile Beach and Stingray City.

December is the second most popular month of the year for people to visit Grand Cayman for a vacation, according to the Caribbean Tourism Organization.

December also is a popular month for visiting the Caribbean because of people who want to escape the cold northern winters in the U.S., Canada and Europe.

Grand Cayman Temperatures

Grand Cayman temperatures in December have an average high of 87 degrees Fahrenheit or about 31 degrees Celsius, according to the National Meteorological Service of the Cayman Islands.

Grand Cayman also is one of the warmest Caribbean islands throughout the year. The average high of 87 degrees Fahrenheit in December is one of the highest temperatures among all Caribbean islands during December.

Although temperatures historically stay warm during the day, temperatures drop more than usual at night. The average low temperature at Grand Cayman during December is 67 degrees Fahrenheit or 19 degrees Celsius, according to the National Meteorological Service of the Cayman Islands.

Low nighttime temperatures may make ocean swimming uncomfortable at times, especially in the mornings.

Grand Cayman Rainfall

The island has two distinct weather patterns. They are a rainy season from May through November and a dry season from January through April. December is a transition month between the rainy and dry seasons.

The average rainfall during the Grand Cayman rainy season over a 30-year period ranges from about five and a half inches in May to a high point of eight inches in September and October. The average for the dry season is about two inches a month. The average for December is more than three inches with heavier rain more likely in the early part of the month. So December is moderately above average.

Because of these rainy and dry seasons, cruise visits to Grand Cayman start climbing in December and continue until April before starting to decline again.

• Grand Cayman 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.
November 13, 2023

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