Average temperatures, rainfall, sunshine and the best time to visit Rarotonga.
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10-day forecastForecast
The climate in Rarotonga, Aitutaki, Cook Islands, is remarkably consistent, with temperatures year-round averaging 26°C (79°F). The warmest month is March at 28°C (82°F), and the coolest is August at 25°C (77°F).
The city has a wet climate, receiving around 1681 mm (66 in) of rainfall per year. Despite the high annual total, it has a distinct rainy season from December to March. January is the wettest month. The sunniest month is August, with 6.4 hours of sunshine per day on average.
Pick a month to see the average temperature, rainfall and sunshine in Rarotonga - and find the best time to visit.
In Rarotonga temperatures are generally consistent throughout the year. On average, daytime temperatures range from a comfortable 28°C (82°F) in March to a comfortable 25°C (77°F) in August.
Nighttime temperatures range from 26°C (79°F) in March to 22°C (72°F) in August.
Check out our detailed temperature page for more information.
Rarotonga experiences significant rainfall throughout the year, averaging 1681 mm (66 in) of precipitation annually. The seasons in Rarotonga bring significant changes in precipitation. The wettest month, January, receives heavy rainfall, with an average of 225 mm (8.9 in) of precipitation. This rainfall is distributed across 13 rainy days.
In contrast, the driest month, June, experiences much less rainfall, totaling 75 mm (3 in) over 11 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Rarotonga Precipitation page.
The sunniest days in Rarotonga occur in August, with around 6.4 hours of daily sunshine. Even in May, the least sunny month, Rarotonga doesn't shy away from the sun, still enjoying a comfortable 5.4 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
The city experiences its highest humidity in March, reaching 90%. In October, the humidity drops to its lowest level at 79%. What does this mean? Read our detailed page on humidity levels for further details.
The average wind speed over the year ranges from 3 m/s (6 knots) to 5 m/s (10 knots). It is lower in March and April and higher in September. What does this mean?
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
June, August, September and October typically offer the most optimal weather in Rarotonga. In contrast, January, February and December tend to have less optimal conditions. Rarotonga has a distinct rainy season from December to March.
Daytime highs range from 25°C (77°F) in August to 28°C (82°F) in March. Nighttime lows range from 22°C (72°F) to 26°C (79°F). Temperatures stay relatively stable year-round.
Annual rainfall is around 1681 mm (66 in). January is the wettest month with 225 mm (8.9 in), while June is the driest with 75 mm (3 in).
Rarotonga receives around 2,096 hours of sunshine per year. August is the sunniest month with 191 hours, while May is the cloudiest with just 162 hours. Overall, Rarotonga enjoys abundant sunshine.
Rarotonga is highlighted - select any city to see its climate.
Where to go in October - average daytime high across popular destinations.
Penrhyn
29°C (84°F) Aitutaki
27°C (81°F) Arutanga27°C (81°F) Muri25°C (77°F) Avarua25°C (77°F) Arorangi25°C (77°F) Rarotonga25°C (77°F) Ngatangiia25°C (77°F) Need travel inspiration? Check out our bucket list articles and be inspired.
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