Diego Garcia
British Indian Ocean Territory
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Diego Garcia, British Indian Ocean Territory

Palm trees bent towards the ocean in a lagoon beach in Diego Garcia, within the British Indian Ocean Territory
Palm trees bent towards the ocean in a lagoon beach in Diego Garcia, within the British Indian Ocean Territory
The first month of the summer, December, is also a hot month in Diego Garcia, British Indian Ocean Territory, with average temperature varying between 31°C (87.8°F) and 27°C (80.6°F).

Temperature

The warmest months are January, February and December, with an average high-temperature of 31°C (87.8°F).

Rainfall

In Diego Garcia, in December, during 11 rainfall days, 186mm (7.3") of precipitation is typically accumulated. In Diego Garcia, British Indian Ocean Territory, during the entire year, the rain falls for 123 days and collects up to 2213mm (87.1") of precipitation.

Sea temperature

In Diego Garcia, British Indian Ocean Territory, the average water temperature is 28°C (82.4°F).
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

Months with the longest days are January, November and December, with an average of 12.5h of daylight.

Sunshine

In Diego Garcia, the average sunshine is 7.1h.

UV index

January through April, August through December, with an average maximum UV index of 12, are months with the highest UV index in Diego Garcia. A UV Index value of 11, and more, symbolizes an ultimate health vulnerability from the exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 12 in December interpret into the following advice:
Take all necessary precautions, as unprotected skin can burn in minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the 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. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What are the warmest months in Diego Garcia?

January, February and December, with an average high-temperature of 31°C (87.8°F), are warmest months in Diego Garcia, British Indian Ocean Territory.

What is the temperature in December in Diego Garcia?

In December, in Diego Garcia, the average high-temperature is 31°C (87.8°F), and the average low-temperature is 27°C (80.6°F).

How many days does it rain in December in Diego Garcia?

In Diego Garcia, British Indian Ocean Territory, in December, it is raining for 11 days, with typically 186mm (7.3") of accumulated precipitation.

What is the water temperature in December in Diego Garcia?

In Diego Garcia, the average seawater temperature in December is 28°C (82.4°F). 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.

When are the longest days in Diego Garcia?

Months with the longest days in Diego Garcia, British Indian Ocean Territory, are January, November and December, with an average of 12.5h of daylight.

How many hours of daylight does Diego Garcia have in December?

In December, the average length of the day in Diego Garcia, British Indian Ocean Territory, is 12.5h.

How many hours of sunshine does Diego Garcia have in December?

In December, the average sunshine in Diego Garcia is 7.1h.

When is the highest UV index in Diego Garcia?

January through April, August through December, with an average maximum UV index of 12, are months with the highest UV index in Diego Garcia, British Indian Ocean Territory.

What is the UV index intensity in December in Diego Garcia?

The average daily maximum UV index in December in Diego Garcia is 12. A UV Index of 11, and more, symbolizes an ultimate hazard to health from the exposure to the Sun's UV rays.
Average temperature in December - Diego Garcia, British Indian Ocean Territory
  • Average high temperature in December: 31°C

Warmest months (with the highest average high temperature) are January, February and December (31°C).
Months with the lowest average high temperature are March, April, May, June, July, August, September, October and November (30°C).

  • Average low temperature in December: 27°C

Months with the highest average low temperature are January, March, April, May, August, September, October and December (27°C).
Coldest months (with the lowest average low temperature) are February, June, July and November (26°C).

Average rainfall in December - Diego Garcia, British Indian Ocean Territory
  • Average rainfall in December: 186mm

The wettest month (with the highest rainfall) is August (298mm).
The driest month (with the lowest rainfall) is February (18mm).

Average rainfall days in December - Diego Garcia, British Indian Ocean Territory
  • Average rainfall days in December: 11 days

The month with the highest number of rainy days is June (17 days).
Months with the lowest number of rainy days are February and March (1 days).

Average sea temperature in December - Diego Garcia, British Indian Ocean Territory
  • Average sea temperature in December: 28°C

Best months for swimming (with the highest average sea temperature) are March and April (29°C).
Coldest months (with the lowest average sea temperature) are June, July, August and September (27°C).

Average daylight in December / Average sunshine in December - Diego Garcia, British Indian Ocean Territory
  • Average daylight in December: 12.5h

Months with the longest days are January, November and December (Average daylight: 12.5h).
Months with shortest days are June and July (Average daylight: 11.7h).

  • Average sunshine in December: 7.1h

The month with most sunshine is February (Average sunshine: 9.3h).
Months with least sunshine are June and September (Average sunshine: 6.7).

Average UV index in December - Diego Garcia, British Indian Ocean Territory
  • Average UV index in December: 12

Months with the highest UV index are January, February, March, April, August, September, October, November and December (UV index 12).
Months with the lowest UV index are June and July (UV index 10).