Cayman Islands weather

Our guide to the weather in the Cayman Islands during December

27

Average high

7

UV Index

96mm

Monthly rainfall

28

Sea temperature

We've looked at the most up-to-date weather data for the Cayman Islands, 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 the Cayman Islands weather in December.

How warm is it in the Cayman Islands during December?

The temperature is extremely stable in December with average highs of 27℃ and lows just 1℃ 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 the Cayman Islands during December?

On average, there will be 3 rainy days during the month, amounting to 95.6mm in total. That's a significant amount of rain. For comparison, the wettest months in the UK typically sees between 80mm and 100mm, depending on where you are. 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 the Cayman Islands during December?

Expect moderate breeze becoming stronger at times during December, with occasional gusts up to 22mph. 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 the Cayman Islands during December?

The water around the Cayman Islands 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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Weather in the Cayman Islands

Our month-by-month guide to the weather and climate in the Cayman Islands

26.1

Cayman Islands weather in

January
26.1

Cayman Islands weather in

February
26.1

Cayman Islands weather in

March
27.1

Cayman Islands weather in

April
27.9

Cayman Islands weather in

May
28.6

Cayman Islands weather in

June
29.1

Cayman Islands weather in

July
29.5

Cayman Islands weather in

August
29.4

Cayman Islands weather in

September
28.9

Cayman Islands weather in

October
27.7

Cayman Islands weather in

November
26.9

Cayman Islands weather in

December