Diego Garcia is an atoll and functions as the capital of the British Indian Ocean Territory, or Chagos Islands. It's also the largest of the islands and the only one which is inhabited (around 4,000 people).
Diego Garcia has a tropical climate, meaning generally hot and humid weather, although the constant breeze keeps thing relatively cool. Temperatures average around 30 °C during the day and rarely drop below 18 °C degrees at night. The wet season is roughly between October and February, with cyclones being a risk throughout this period as well. During the rest of the year, rain is possible still but mainly mean some late afternoon showers.
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