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Rarotonga, Cook Islands. Author Robert Linsdell. Licensed under the Creative Commons Attribution
Rarotonga, Cook Islands. Author Robert Linsdell

Cook Islands climate: when to go to the Cook Islands

The Cook Islands lie north of the Tropic of Capricorn, they typically have a tropical oceanic climate, with temperatures stable throughout the year, the average maximum temperatures vary between 25°C and 29°C, while the average minimum temperatures vary between 18°C in July and August and 23°C in January and February.

The differences are mainly due to seasonal rainfall patterns, in the Cook Islands there are in fact two seasons, a wet and rainy season from December to March, and a mild dry season from April to November. During the rainy season, from December to March, the Cook Islands can sometimes be affected by tropical cyclones and hurricanes.

The average annual rainfall is around 2100 mm, the wettest months are between December and April, the months with less than rainfall are those between June and October. Mosquito repellent are needed especially during the hot and humid season (December-March), especially on the island of Aitutaki.

One Foot Island, Aitutaki, Cook Islands. Author Philby. Licensed under the Creative Commons Attribution

One Foot Island, Aitutaki, Cook Islands. Author Philby

The annual average temperature of the seawater in Rarotonga is 26°C, with a maximum temperature of 28°C in February and a minimum of 24°C in August.

WHEN TO GO TO THE COOK ISLANDS

For a trip to the Cook Islands are generally preferred the less rainy months ranging from May/June to October.

COOK ISLANDS CLIMATE TABLES

AVARUA, RAROTONGA (6 metres)
Month Average low (°C) Average high (°C) Precip. (mm) Precip. days
January 23 29 234
February 23 29 257
March 22 29 284
April 22 28 196
May 20 26 150
June 19 25 122
July 18 25 112
August 18 25 119
September 19 25 127
October 20 26 135
November 21 27 163
December 22 28 206
YEAR 2105
RAROTONGA
Month Sea Water Temperature °C
January 27
February 28
March 28
April 27
May 27
June 25
July 24
August 24
September 25
October 25
November 26
December 26
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