Avarua weather in September 2025

Expect 26°C daytime maximum temperatures in the shade with on average -9999 hours of sunshine per day in Avarua in September. Check more long-term weather averages for Avarua in September before you book your next holiday to Cook Islands in 2025/2026.

  • 26°C maximum daytime temperature in September in Avarua26
    26°C max day temperature
  • 5 days with some rainfall in September in Avarua5
    5 days with some rainfall
  • 19°C minimum night-time temperature in September in Avarua19
    19°C min night temperature
  • 12 hours of daylight per day in September in Avarua12
    12 hours of daylight per day
  • Low heat & humidity in September in AvaruaL
    Low heat & humidity
  • 132 mm monthly rainfall in September in Avarua132
    132 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in September in Avarua10
    10 (Very High) UV index
  • 24°C sea temperature in September in Avarua24
    24°C sea temperature

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

Daytime temperatures usually reach 26°C in Avarua in September with low heat and humidity, falling to 19°C at night.

How warm is the sea around Avarua in September?

The average sea temperature around Avarua in September is 24°C.

Does it rain in Avarua in September?

There are usually 5 days with some rain in Avarua in September and the average monthly rainfall is 132mm.

Avarua September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:48 18:30
Monday, 15th September 2025 06:35 18:34
Tuesday, 30th September 2025 06:21 18:37

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