Cook Islands weather in January

January falls during the rainy season in the Cook Islands and is often the wettest month of the year. You can expect frequent but short-lived downpours between sunshine. It’s also the cyclone season, so it’s best to be aware of the cyclone and weather warnings.

How hot is it in the Cook Islands in January?
Daytime temperatures average a high of 29°C (84°F) in the Cook Islands in January, with moderate to high heat and humidity, falling to a night-time low of 24°C (75°F).

How sunny is it in the Cook Islands in January?
There are normally five hours of sunshine each day in the Cook Islands in January – that's around 38% of daylight hours.

Sunrise & sunset in January?
Sunrise is around 6:10am with sunset around 7:25pm.

How warm is the sea in the Cook Islands in January?
The average sea temperature in the Cook Islands in January is 27°C (80°F), which is pleasant for swimming.

Does it rain in the Cook Islands in January?
Monthly rainfall in the Cook Islands in January averages 171mm (7in), distributed across 13 days on average.

How windy is it in the Cook Islands in January?
January sees an average wind speed of around 21 kilometres per hour (13 mph; 11 knots). The predominant average wind direction in the Cook Islands is from the east.

What to do in the Cook Islands in January?
Despite the sometimes wet weather, January is still good for a range of water sports, including swimming, scuba diving, snorkelling and kitesurfing.

Local holidays?
New Year's Day and the day after – 1st/2nd Jan. Early-January is considered high season and hotel and flights should be booked early. However, following the holiday season January reverts to low season for all tourism bookings.

Cook Islands – January Weather Averages

Temperature icon High Temp: 29°C (84°F)
temperature icon Low Temp: 24°C (75°F)
sun icon Sunshine: 5 hours per day
Moderately hot icon
Daylight: 13 hours per day
umbrella icon Wet Days: 13 days with some rain
rain cloud Rainfall: 171 mm (7 in) per month
Moderate heat icon Comfort Level: Moderate heat; ≤ 30 muggy days
Moderately hot icon
UV Index: Extreme
wind icon Wind speed: 21 km/h (13 mph; 11 knots).
swimming icon Sea Temp: 27°C (80°F)
Avarua, Rarotonga, Cook Islands

Best time to visit the Cook Islands

The best time of year to visit the Cook Islands is during the winter dry season from June through September.

For warmer weather visit in April and May, or in October and November when you can expect higher temperatures but also the probability of more rain showers.

 › Cook Islands weather overview

Cook Islands weather by month

Source: Meteorological data for the Cook Islands is based on weather statistics gathered for the 30-year period 1992 to 2021 by the Cook Islands Meteorological Service at the closest weather station: Rarotonga International Airport (RAR), located less than 3km (2mi) west of Avarua Harbour. Additional climate data is sourced from the United States National Oceanic and Atmospheric Administration (NOAA).

Advice on the best time to visit a particular destination is based on average local weather statistics, when the weather conditions are generally better than at other times of the year. We consider high and low temperatures, risk of rain (and thunderstorms, etc.), amount of sunshine and sea temperature. For general outdoor activities we favour clear, rainless days with a temperature range between 18°C (64°F) and 27°C (80°F); and for hot-weather activities we favour clear, rainless days with a temperature range between 24°C (75°F) and 32°C (89°F). Often, the best times to visit correspond to high season and therefore involve higher prices.

Latest update: Cook Islands weather in January: 12 June, 2024

Disclaimer: The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data and conditions at any given location and time are unpredictable and variable. We assume no responsibility and can not be held legally responsible for any decisions made on the basis of the information presented on this site.