Cook Islands weather in September 2021

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Below are average maximum temperatures at popular destinations in the Cook Islands in September. Select a destination to see more weather parameters.

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The September weather guide for Cook Islands 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.

How hot is it in the Cook Islands in September?

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

How warm is the sea around the Cook Islands in September?

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

Does it rain in the Cook Islands in September?

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

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

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Cook Islands sunrise & sunset times for September 2021

Browse the sunrise and sunset times for Cook Islands in September 2021. Select a month to view Cook Islands sunrise & sunset times for the next 12 months. The Cook Islands sunrise and sunset times shown below are for Avarua.


Date Sunrise times Sunset times
Wednesday, 1st September 2021 06:48 18:30
Wednesday, 15th September 2021 06:35 18:34
Thursday, 30th September 2021 06:21 18:37
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