December weather forecast
British Indian Ocean Territory

December in the British Indian Ocean Territory continues the conditions of the wet season, characterized by high levels of rainfall. The average precipitation during this month is approximately 220mm (8.66"), an increase from November, making December one of the wettest months of the year.

Temperatures in December maintain a range similar to previous months, with averages from 26°C (78.8°F) to 28°C (82.4°F). The relative humidity remains high, typically exceeding 80%, which can make the actual temperatures feel warmer than they are.

In comparison to November, December sees a slight increase in rainfall, while temperatures and humidity remain relatively constant. Looking forward to January, the wet season continues, with similarly high rainfall and steady temperatures expected.

As with the other months, the U.S. naval support facility on Diego Garcia, the largest settlement in the territory, experiences similar weather conditions in December. The British Indian Ocean Territory, being predominantly uninhabited, does not feature any notable cities.

While the high rainfall in December may discourage some visitors, the month can still offer unique experiences. The heightened rainfall leads to an enhanced lushness in the island's vegetation, while the underwater ecosystem thrives, providing rich experiences for divers and snorkelers. The presence of a variety of seabirds and migratory species during this period also adds to the area's appeal.

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• Diego Garcia - December »
  December has the longest days of the year in Diego Garcia with an average of 12h and 30min of daylight. On the first day of December in Diego Garcia, British Indian Ocean Territory, sunrise is at 06:43 and sunset at 19:14.