The month in detail
What to expect in December
Summer in Cook Islands brings pleasant temperatures (24°C) and long sunny days (7.0h of sunshine). Expect rain on 37% of days — a light raincoat in the bag is recommended. A good balance between weather and crowds, even if October (8.1/10) remains theoretically better.
December ranks 9 out of 12 months in Cook Islands. Compared to November: +2°C daytime, 15 pts more rainy days, −1.2h of sun per day.
This month's conditions
What it's like in December
UV index
8 · very high
protection essential
Feels like
muggy at times
20°
Sea
26°C
warm, ideal
Daylight
13.3h of daylight
Air quality
excellent
AQI 14
Compare
Is December the right month?
The best month in Cook Islands is October (8.1/10), 0.3 pt higher than December.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · Cook Islands
Expedia →
Activities
Tours, tickets, experiences
See ↓
Flights
Multi-airline comparator
Kiwi →
🎟️ Activities & tours · Cook Islands
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a tropical stay.
Country · Cook Islands
🗣️LanguageEnglish
💶CurrencyNew Zealand Dollar ($)
🚗DrivingLeft-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘModerate · 3/5
🌡️ Climate
🌍Climate typeTropical
📈Climate trend ⓘStable
🔥Hottest monthJanuary · 25°C
❄️Coolest monthJune · 22°C
🌧️Rainiest month ⓘFebruary · 41%
🏝️ Tropical stay
🌞Dry season ⓘMay → Sep
🌧️Wet season ⓘDec → Mar
🌀Cyclones ⓘSeason Nov-Apr
Explore
Other destinations in December
If December doesn't convince you for this destination, compare with others.
Similar climate
RarotongaCook Islands
HoniaraSolomon Islands
MoroniComoros
TongaTonga
MooreaFrench Polynesia
Location
Where is Cook Islands ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
Cook IslandsTropical climate with a 8.1 → 7.7 gap between best and worst month. 10 years of ERA5 data to choose by project.
21.24°S · 159.78°W
Questions
Frequently asked questions
What is the best time to visit Cook Islands?
November is the best month with 22.0°C highs, 21.0°C lows, 8.2h of sunshine and 22.0% rainy days. The months of November & June offer comparable conditions.
How many hours of sunshine does Cook Islands get in November?
Cook Islands averages 8.2 sunshine hours per day in November. It is the sunniest month with a climate score of 7.6/10.
What is the rainiest month in Cook Islands?
February is the most unfavourable month with February has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Cook Islands in November?
In November, overnight lows reach 21.0°C, while afternoon highs average 22.0°C.
Is Cook Islands good in winter?
In winter (December-February), Cook Islands scores 7.3/10 on average — Decent period conditions for cultural visits.. The best month overall remains November with a score of 7.6/10.
When should you avoid Cook Islands?
February is the most difficult month to visit Cook Islands, with February has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in Cook Islands in December?
In December, the sea averages 26°C in Cook Islands: warm, ideal. Ideal conditions for swimming and snorkeling.
Do you need sun protection in Cook Islands in December?
The average UV index reaches 8 in December in Cook Islands (very high), with about 13.3h of daylight. Protection essential.