British Indian Ocean Territory weather in January 2026

Expect 30°C daytime maximum temperatures in the shade in British Indian Ocean Territory in January based on long-term weather averages. There is usually 16 days with some rainfall and 291 mm of average monthly rainfall in January.

  • 30°C maximum daytime temperature in January in British Indian Ocean Territory (Diego Garcia)30
    30°C max day temperature
  • 16 days with some rainfall in January in British Indian Ocean Territory (Diego Garcia)16
    16 days with some rainfall
  • 25°C minimum night-time temperature in January in British Indian Ocean Territory (Diego Garcia)25
    25°C min night temperature
  • 12 hours of daylight per day in January in British Indian Ocean Territory (Diego Garcia)12
    12 hours of daylight per day
  • High heat & humidity in January in British Indian Ocean Territory (Diego Garcia)H
    High heat & humidity
  • 291 mm monthly rainfall in January in British Indian Ocean Territory (Diego Garcia)291
    291 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in January in British Indian Ocean Territory (Diego Garcia)11
    11+ (Extreme) UV index
  • 29°C sea temperature in January in British Indian Ocean Territory (Diego Garcia)29
    29°C sea temperature

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The January weather guide for British Indian Ocean Territory, represented by Diego Garcia, (Diego Garcia) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in the British Indian Ocean Territory in January?

Daytime temperatures usually reach 30°C in Diego Garcia, British Indian Ocean Territory in January with high heat and humidity, falling to 25°C at night.

How warm is the sea around the British Indian Ocean Territory in January?

The average sea temperature around Diego Garcia, British Indian Ocean Territory in January is 29°C.

Does it rain in the British Indian Ocean Territory in January?

There are usually 16 days with some rain in Diego Garcia, British Indian Ocean Territory in January and the average monthly rainfall is 291mm.

What is the chance of a cyclone in the British Indian Ocean Territory in January?

On average less than 1 day in January in Diego Garcia, British Indian Ocean Territory is likely to be affected by the passage of one or more tropical storms.

British Indian Ocean Territory January sunrise & sunset times

Browse the sunrise and sunset times for British Indian Ocean Territory in January 2026. Select a month to view British Indian Ocean Territory sunrise and sunset times for the next 12 months. The British Indian Ocean Territory sunrise and sunset times shown below are for Diego Garcia.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st January 2026 06:58 19:30
Friday, 16th January 2026 07:05 19:35
Saturday, 31st January 2026 07:11 19:37

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