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.
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|
|Month||Sea Water Temperature °C|
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