December temperatures in the Caribbean range from an average low of 73.3 degrees to an average high of 82.9 degrees. Rain occurs in the Caribbean a total of 11.4 days during an average December. Total precipitation during the month averages 3.7 inches.

During the early morning hours of an average December day in the Caribbean, you can expect the temperature will be in the vicinity of 73.9 degrees. The temperature will rise over the course of the typical December day, reaching somewhere around 81.9 degrees by early afternoon. By the early evening hours in December the temperature will generally fall to somewhere in the vicinity of 76.5 degrees. Overall, temperatures in the Caribbean during December average around 77.8 degrees.

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