British Indian Ocean Territory weather in May 2025

Expect 30°C daytime maximum temperatures in the shade with on average -9999 hours of sunshine per day in British Indian Ocean Territory in May. Check more long-term weather averages for British Indian Ocean Territory in May before you book your next holiday to British Indian Ocean Territory in 2025/2026.

  • 30°C maximum daytime temperature in May in British Indian Ocean Territory (Diego Garcia)30
    30°C max day temperature
  • 16 days with some rainfall in May in British Indian Ocean Territory (Diego Garcia)16
    16 days with some rainfall
  • 25°C minimum night-time temperature in May in British Indian Ocean Territory (Diego Garcia)25
    25°C min night temperature
  • 12 hours of daylight per day in May in British Indian Ocean Territory (Diego Garcia)12
    12 hours of daylight per day
  • High heat & humidity in May in British Indian Ocean Territory (Diego Garcia)H
    High heat & humidity
  • 164 mm monthly rainfall in May in British Indian Ocean Territory (Diego Garcia)164
    164 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in May in British Indian Ocean Territory (Diego Garcia)11
    11 (Extreme) UV index
  • 28°C sea temperature in May in British Indian Ocean Territory (Diego Garcia)28
    28°C sea temperature

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The May 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 May?

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

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

The average sea temperature around Diego Garcia, British Indian Ocean Territory in May is 28°C.

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

There are usually 16 days with some rain in Diego Garcia, British Indian Ocean Territory in May and the average monthly rainfall is 164mm.

British Indian Ocean Territory May sunrise & sunset times

Browse the sunrise and sunset times for British Indian Ocean Territory in May 2025. 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 May 2025 07:12 19:03
Friday, 16th May 2025 07:13 19:00
Saturday, 31st May 2025 07:16 19:00

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