Aitutaki weather in September 2025

Expect 28°C daytime maximum temperatures in the shade with on average -9999 hours of sunshine per day in Aitutaki in September. Check more long-term weather averages for Aitutaki in September before you book your next holiday to Cook Islands in 2025/2026.

  • 28°C maximum daytime temperature in September in Aitutaki28
    28°C max day temperature
  • 5 days with some rainfall in September in Aitutaki5
    5 days with some rainfall
  • 21°C minimum night-time temperature in September in Aitutaki21
    21°C min night temperature
  • 12 hours of daylight per day in September in Aitutaki12
    12 hours of daylight per day
  • Moderate heat & humidity in September in AitutakiM
    Moderate heat & humidity
  • 90 mm monthly rainfall in September in Aitutaki90
    90 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in September in Aitutaki11
    11 (Extreme) UV index
  • 26°C sea temperature in September in Aitutaki26
    26°C sea temperature

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The September weather guide for Cook Islands (Aitutaki) 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 Aitutaki in September?

Daytime temperatures usually reach 28°C in Aitutaki in September with moderate heat and humidity, falling to 21°C at night.

How warm is the sea around Aitutaki in September?

The average sea temperature around Aitutaki in September is 26°C.

Does it rain in Aitutaki in September?

There are usually 5 days with some rain in Aitutaki in September and the average monthly rainfall is 90mm.

Aitutaki September sunrise & sunset times

Browse the sunrise and sunset times for Aitutaki in September 2025. Select a month to view Aitutaki sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:46 18:32
Monday, 15th September 2025 06:34 18:34
Tuesday, 30th September 2025 06:21 18:37

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