Saint Lucia weather

Our guide to the weather in Saint Lucia during December

28

Average high

6

UV Index

64mm

Monthly rainfall

28

Sea temperature

St Lucia is a lush tropical Caribbean island and is very warm all year round. We've looked at the most up-to-date weather data for Saint Lucia, covering the last 12 years up to 2024, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about Saint Lucia weather in December.

How warm is it in Saint Lucia during December?

The temperature is extremely stable in December with average highs of 28℃ and lows just 3℃ lower at 26℃. Of course, the high humidity will make it feel even hotter. The UV index will be high at this time of year, so protection against skin and eye damage is needed. Try to limit exposure between 10am and 4pm. Apply broad spectrum SPF 30+ sunscreen every few hours, even if it's cloudy, or more frequently after sweating or swimming, and wear UV-blocking sunglasses too, and bear in mind that bright surfaces, such as sand and water increase UV exposure.

Does it rain in Saint Lucia during December?

On average, there will be 2 rainy days during the month, amounting to 64.1mm in total. That's broadly comparable with the amount of rain we see in England during the summer months, and would be considered dry. Due to the high temperature and humidity, you might expect lots of thunderstorms, however they're actually fairly infrequent at this time of year. On average, December will see just 1 days that produce a storm.

Is it windy in Saint Lucia during December?

Expect moderate breeze becoming stronger at times during December, with occasional gusts up to 19mph. The high humidity and warm temperature will make the breeze feel warm, so any cooling effect will be limted.

How warm is the sea in Saint Lucia during December?

The water around Saint Lucia reaches a very pleasant 28℃ during December. This is very warm, and will feel bath-like. People who normally feel the cold will find this temperature perfectly acceptable. The hot air temperature and relatively high humidity will mean that you will feel comfortably warm when coming out of the water.

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Saint Lucia Blog posts

From the UK's most popular travel bloggers

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This week's successes: 21st April 2024

21st April 2024 by Stuart

We have 3 new winners and lots of prize updates to update you on this week...New winners Rebecca has won the Cruise Nation Easter competition: “I just wanted to say a HUGE thank you…I have just received (an) email to say that I have won a £500 MSC cruise! My first win in absolutely ages!” Elizabeth was alerted to a prize win by one of our Facebook group moderators and she’ll be enjoying a 2-night autumn break in Haybarn Cottage at Swainsley Farm Holiday Cottages near Leek,...

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Sailing Paradise: The Top 3 Caribbean Destinations For A Family Adventure

11th April 2023 by Big Family Little Adventures

If you’re a sailing enthusiast, few places in the world are as alluring as the Caribbean. With its crystal-clear waters, consistent trade winds, and breathtaking scenery, it’s no wonder that sailors worldwide flock to this tropical paradise....

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Cheapest places to holiday in February

12th February 2021 by Andy

Plummeting temperatures do little to help the onset of post-holiday blues, so what does that mean for travellers? A hot, long-haul trip to distant shores where the sun is shining, festivals are in full swing and prices are cheaper than January.If you embrace the cold and can’t wait to get the snow gear out, you’ll also find an abundance of powder in some of the world’s top ski resorts. Get ready to drag out the festive season just that little bit longer, with top holiday places to visit...

Weather in Saint Lucia

Our month-by-month guide to the weather and climate in Saint Lucia

27.5

Saint Lucia weather in

January
27.3

Saint Lucia weather in

February
27.5

Saint Lucia weather in

March
28.2

Saint Lucia weather in

April
28.9

Saint Lucia weather in

May
29.1

Saint Lucia weather in

June
29.2

Saint Lucia weather in

July
29.8

Saint Lucia weather in

August
30.4

Saint Lucia weather in

September
29.9

Saint Lucia weather in

October
29.0

Saint Lucia weather in

November
28.2

Saint Lucia weather in

December