December weather forecast
Diego Garcia, British Indian Ocean Territory

December marks the conclusion of the truly tropical weather cycle in Diego Garcia with a decrease in rainfall to 186mm (7.32"). The leap in sunlight hours to 7.1 per day and the continuation of 12.5 daylight hours further emphasize the tropical weather pattern's year-end arc. As the monsoon season tapers, the stabilization of temperature, daylight, and sunshine hours combine to make December an inviting blend of mild rainfall and sunshine, a fitting month to wrap up the climatic calendar.

Temperature

January, February and December are characterised by peak temperatures, with an average high of 31°C (87.8°F).

Rainfall

In Diego Garcia, during December, the rain falls for 11 days and regularly aggregates up to 186mm (7.32") of precipitation. In Diego Garcia, during the entire year, the rain falls for 123 days and collects up to 2213mm (87.13") of precipitation.

Sea temperature

In December, the average sea temperature in Diego Garcia is 28°C (82.4°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

December has the longest days of the year, with an average of 12h and 30min of daylight.
On the first day of the month, sunrise is at 06:43 and sunset at 19:14. On the last day of December, in Diego Garcia, sunrise is at 06:57 and sunset at 19:29 +06.

Sunshine

In Diego Garcia, British Indian Ocean Territory, the average sunshine in December is 7.1h.

UV index

The months with the highest UV index are January through April, August through December, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an excessive health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The daily high UV index of 12 in December translates into this advice:
Carry out all important precautions, unprotected skin could get burns in no time. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Attention! UV radiation is markedly stronger with water and sand reflections.