December weather forecast
West Island, Cocos (Keeling) Islands

December rounds off the year by bringing back the high-level rainfall of 152mm (5.98") experienced in January. Maintaining 12.8 hours of daylight, the longest of the year, the island visitors and inhabitants are spoiled with extra time to enjoy the tropical paradise. The sea temperature stands stable at 27°C (80.6°F), counteracting the increment in rainfall. With the UV index at 12, this month certainly calls for careful preparations against sun exposure. As the year concludes, the weather conditions align with the predominant features of a tropical climate, confirming the undisturbed nature of the Cocos (Keeling) Islands as a tropical haven.

Temperature

Upon the onset of December, West Island witnesses an average high-temperature of a still warm 29°C (84.2°F), showing a close resemblance to the prior month. A mild drop to an average of 24°C (75.2°F) marks the nights during December.

Rainfall

In December, the rain falls for 11 days. Throughout December, 152mm (5.98") of precipitation is accumulated. In West Island, during the entire year, the rain falls for 186 days and collects up to 2082mm (81.97") of precipitation.

Sea temperature

July through December, with an average sea temperature of 27°C (80.6°F), are months with the coldest seawater in West Island, Cocos (Keeling) Islands.
Note: Between 25°C (77°F) and 29°C (84.2°F), water temperature is typically considered very warm and pleasurable by everyone. Water activities at these temperatures are enjoyable for extended periods without discomfort.

Daylight

The month with the longest days is December, with an average of 12h and 48min of daylight.
On the first day of December in West Island, sunrise is at 05:28 and sunset at 18:15. On the last day of the month, sunrise is at 05:40 and sunset at 18:30 +0630.

Sunshine

December has the least sunshine of the year, with an average of 11h of sunshine.

UV index

The months with the highest UV index in West Island are January through April, September through December, with an average maximum UV index of 12. A UV Index estimate of 11, and higher, represents an excessive health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: A daily high UV index of 12 in December leads to these guidelines:
Take all required precautions, as unprotected skin and eyes can burn in minutes. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. To cut down UV radiation exposure by about half, sport a wide-brim hat. Even on overcast days, apply and frequently reapply a sunscreen with SPF 30 or more, specifically after a swim or outdoor workout. Alert! The Sun's UV rays are heightened by the reflection of sand and water.