Cook Islands weather in January 2026

Q: How hot is it in the Cook Islands in January?

Daytime temperatures usually reach 28°C in Avarua, Cook Islands in January with high heat and humidity, falling to 23°C at night.

Q: How warm is the sea around the Cook Islands in January?

The average sea temperature around Avarua, Cook Islands in January is 27°C.

Q: Does it rain in the Cook Islands in January?

There are usually 17 days with some rain in Avarua, Cook Islands in January and the average monthly rainfall is 267mm.

Q: What is the chance of a cyclone in the Cook Islands in January?

On average less than 1 day in January in Avarua, Cook Islands is likely to be affected by the passage of one or more tropical storms.

Expect daytime maximum temperatures of 82°F in Cook Islands in January and high heat and humidity based on long-term weather averages. There are 17 days with some rainfall and typically 10.5 inches of rainfall in the month.

82
82°F max day temperature
17
17 days with some rainfall
73
73°F min night temperature
13
13 hours of daylight per day
H
High heat & humidity
10.5
10.5 inches of monthly rainfall
11
11+ (Extreme) UV index
81
81°F sea temperature

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The January weather guide for Cook Islands (Avarua) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Top Cook Islands destinations

Below are average maximum temperatures at popular countries, regions and places in the Cook Islands in January. Select a holiday destination to see more weather parameters.

All Cook Islands destinations

Metric (°C) | Imperial (°F)

How hot is it in the Cook Islands in January?

Daytime temperatures usually reach 82°F in Avarua, Cook Islands in January with high heat and humidity, falling to 73°F at night.

How warm is the sea around the Cook Islands in January?

The average sea temperature around Avarua, Cook Islands in January is 81°F.

Does it rain in the Cook Islands in January?

There are usually 17 days with some rain in Avarua, Cook Islands in January and the average monthly rainfall is 10.5 inches.

What is the chance of a cyclone in the Cook Islands in January?

On average less than 1 day in January in Avarua, Cook Islands is likely to be affected by the passage of one or more tropical storms.

Cook Islands January sunrise & sunset times

Browse the sunrise and sunset times for Cook Islands in January 2026. Select a month to view Cook Islands sunrise and sunset times for the next 12 months. The Cook Islands sunrise and sunset times shown below are for Avarua.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Date	Sunrise times	Sunset times
Thursday, 1st January 2026	06:01	19:25
Friday, 16th January 2026	06:11	19:27
Saturday, 31st January 2026	06:21	19:24

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Cook Islands - quick facts
Time difference	UK -10 hours
Language(s)	English, Maori
Currency	Cook Islands Dollar, New Zealand Dollar
Electricity	I plug (240V)
Driving side	Left
Why visit?	Beaches
Tourist info	Cook Islands Tourism