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St. Lucia

St. Lucia Weather in December

Average high temperature and rainfall for St. Lucia in December.
Average high temperature and rainfall for St. Lucia in December. © 2018 Scott Bateman
Warm and slightly wet is one way to describe St. Lucia weather in December.

This southeastern Caribbean island is a popular place to visit on Caribbean cruises because of its beauty and other attractions. December is a popular month to visit because it gets northerners away from cold winters.

The weather often delivers a good experience for anyone visiting St. Lucia in December.

December Rainfall


December is a transition month between the rainy season and the dry season. St. Lucia is one of the wettest islands in the Caribbean, so the rainy season matters quite a bit in planning a resort vacation or cruise visit there.

The island’s rainy season goes from July through November with average monthly rainfall reaching as high as eight inches a month, according to the St. Lucia Meteorological Service.

In contrast, the true dry season of January through May averages only two to three inches a month.


Both December and June, also a transition month, average about four inches. So rainfall in December is moderate but not ideal.

It rains more often in St. Lucia than many other Caribbean islands. Historically, the island has 17 days of rain in December, which is not as bad as the 20 or more during the rainy season.

December Temperatures


St. Lucia temperatures in December offer better news to Caribbean vacationers.

The average daytime temperature is 85 degrees Fahrenheit or 29 Celsius, which is one of the warmer averages in the Caribbean. Nighttime temperatures average 75 Fahrenheit or 24 Celsius.

Sea temperatures range between the daytime highs and nighttime lows. So they are comfortable throughout most of the day. Wind chills and cooler northern currents may bring down the comfort level at times.

Temperatures don’t get much warmer on the island even during the summer. Then the daytime highs only reach about 87 Fahrenheit.

All of this means that St. Lucia’s December weather is warm, somewhat wet and neither the best nor the worst month to visit the island.
Scott S. Bateman is a professional journalist who has traveled widely throughout the Caribbean and the Americas.

 > Category: Monthly Weather   

December 06, 2018

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