Weather in Cook islands in september 2025

Here, find the the weather forecast for september for most popular cities in Cook islands. These forecasts are probabilities for the month of september from weather reports for many years. The percentage indicates the probability of having the weather mentioned.

Average weather in september in Avarua

good weather UV index: 6

Weather at 6am
76°F

Partly Cloudy

33%

Cloudy

14%

Clear/Sunny

14%

Weather at 12pm
76°F

Moderate rain at times

25%

Clear/Sunny

21%

Cloudy

15%

Weather at 6pm
76°F

Moderate rain at times

25%

Clear/Sunny

18%

Cloudy

18%

Weather at 3am
76°F

Partly Cloudy

34%

Moderate rain at times

31%

Cloudy

19%

Clear/Sunny

15%

More information about the weather in Avarua in september



Where to go in Cook islands in september?

Where to go in Cook islands in september: destination map

Legend: perfect weather good tolerable bad very bad


Where should you go in Cook islands in september when it comes to the weather?

Remember:
The climate in Cook islands in september is good across the board.

Good news: It is not ideal 100%, but the weather in Cook islands in september is, according to seasonal norms, quite good in Rarotonga island, Avarua, Mitiaro island, Mangaia island, Palmerston island, Mauke island, Aitutaki island, Penrhyn island and Atiu island. I allows to enjoy vacation in these areas. And even why not take a little time to enjoy the hotel pool!

If you do not go lazing in the sun, but, for example to discover the heritage, the cities of Rakahanga island, Manihiki island and Pukapuka island have a OK but just acceptable weather for it in september.



Climate in Cook islands in september

Climate in Avarua in september

In the month of september, maximum temperature is 76°F and minimum temperature is 74°F (for an average temperature of 76°F). The climate is quite nice in this city in this month. With 3.4in over 4 days, you will experience some showers for your holidays. But this is pretty moderate and it is only of temporary showers.
With a good climate, the month of september is a good time to go in Avarua in Cook islands.

September
Average temperature 76°F
Highest temperature 76°F
Lowest temperature 74°F
Sea temperature 77°F
Rainfall 3.4in
Number of days with rainfall 4 day(s)
(14%)
Humidity 80%
Daily sunshine hours 10
Cloud cover 50%
Length of day 11:58
Our opinion at whereandwhen.net good
more information about the climate in Avarua in september

Climate in Palmerston island in september

In the month of september, the mean temperature in Palmerston island is 77°F (maximum temperature is 79°F and minimum temperature is 77°F). The climate is pleasant in that locality in the month of september. With 3.2in over 4 days, rain may occur during your vacations. But this is pretty moderate and it will not be continuous.
With a good weather, september is a good time to go in Palmerston island in Cook islands.

September
Average temperature 77°F
Highest temperature 79°F
Lowest temperature 77°F
Rainfall 3.2in
Number of days with rainfall 4 day(s)
(14%)
Humidity 80%
Daily sunshine hours 10
Cloud cover 49%
Length of day 12:00
Our opinion at whereandwhen.net good
more information about the climate in Palmerston island in september

Climate in Rarotonga island in september

In the month of september, the mean temperature in Rarotonga island is 76°F (maximum temperature is 76°F and minimum temperature is 74°F). The climate is quite pleasant in that locality in this month. With 3.4in over 4 days, you risk getting wet slightly for your stay. But this is rather reasonably and you will not be too bothered by it.
With a good climate, the month of september is a good time to go in that area.

September
Average temperature 76°F
Highest temperature 76°F
Lowest temperature 74°F
Sea temperature 77°F
Rainfall 3.4in
Number of days with rainfall 4 day(s)
(14%)
Humidity 80%
Daily sunshine hours 10
Cloud cover 50%
Length of day 11:58
Our opinion at whereandwhen.net good
more information about the climate in Rarotonga island in september

Climate in Rakahanga island in september

In september, maximum temperature is 83°F and minimum temperature is 83°F (for an average temperature of 83°F). The climate is good in that area in the month of september. With 5.7in over 9 days, rainfall can happen throughout your stay. But this is reasonably and you will not be too bothered by it.
With a correct weather, september is okay (but not the best time) for traveling there in Cook islands.

September
Average temperature 83°F
Highest temperature 83°F
Lowest temperature 83°F
Rainfall 5.7in
Number of days with rainfall 9 day(s)
(31%)
Humidity 78%
Daily sunshine hours 11
Cloud cover 43%
Length of day 12:03
Our opinion at whereandwhen.net good

Climate in Aitutaki island in september

In the month of september, maximum temperature is 79°F and minimum temperature is 77°F (for an average temperature of 77°F). The climate is good there in september. With 3.2in over 4 days, you will experience some showers during your vacations. But this is reasonably and it is only of temporary showers.
With a good weather, september is a good month to go in that area in Cook islands.

September
Average temperature 77°F
Highest temperature 79°F
Lowest temperature 77°F
Rainfall 3.2in
Number of days with rainfall 4 day(s)
(14%)
Humidity 80%
Daily sunshine hours 10
Cloud cover 49%
Length of day 12:00
Our opinion at whereandwhen.net good
more information about the climate in Aitutaki island in september


All cities in Cook islands in september

Avarua in septembergood weather
Palmerston island in septembergood weather
Rarotonga island in septembergood weather
Rakahanga island in septembergood weather
Aitutaki island in septembergood weather
Atiu island in septembergood weather
Mangaia island in septembergood weather
Manihiki island in septembergood weather
Mauke island in septembergood weather
Mitiaro island in septembergood weather
Penrhyn island in septembergood weather
Pukapuka island in septembergood weather


Weather data for Cook islands in september:

Weather data for Cook islands in september is derived from an average of the weather forecast since 2009 in Cook islands. There is a margin of error and these forecasts are to be considered as general information only. The weather in Cook islands can vary slightly from year to year, but these predictions should limit surprises. So you can pack your bags and check when is the best time to go to Cook islands.


Change units