Cook Islands weather in May 2025

Expect 27°C daytime maximum temperatures in the shade with on average -9999 hours of sunshine per day in Cook Islands in May. Check more long-term weather averages for Cook Islands in May before you book your next holiday to Cook Islands in 2025/2026.

  • 27°C maximum daytime temperature in May in Cook Islands (Avarua)27
    27°C max day temperature
  • 9 days with some rainfall in May in Cook Islands (Avarua)9
    9 days with some rainfall
  • 21°C minimum night-time temperature in May in Cook Islands (Avarua)21
    21°C min night temperature
  • 11 hours of daylight per day in May in Cook Islands (Avarua)11
    11 hours of daylight per day
  • Moderate heat & humidity in May in Cook Islands (Avarua)M
    Moderate heat & humidity
  • 205 mm monthly rainfall in May in Cook Islands (Avarua)205
    205 mm of monthly rainfall
  • UV (maximum) index 7 (High) in May in Cook Islands (Avarua)7
    7 (High) UV index
  • 26°C sea temperature in May in Cook Islands (Avarua)26
    26°C sea temperature

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The May 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 and places in the Cook Islands in May. Select a holiday destination to see more weather parameters.

All Cook Islands destinations

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in the Cook Islands in May?

Daytime temperatures usually reach 27°C in Avarua, Cook Islands in May with moderate heat and humidity, falling to 21°C at night.

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

The average sea temperature around Avarua, Cook Islands in May is 26°C.

Does it rain in the Cook Islands in May?

There are usually 9 days with some rain in Avarua, Cook Islands in May and the average monthly rainfall is 205mm.

Cook Islands May sunrise & sunset times

Browse the sunrise and sunset times for Cook Islands in May 2025. 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.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 06:57 18:15
Friday, 16th May 2025 07:03 18:08
Saturday, 31st May 2025 07:09 18:05

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