May weather forecast
Cook Islands

May in the Cook Islands is typically the start of the dry season, characterized by a decrease in rainfall and a further drop in temperatures. Average temperatures during this month range from 20°C (68°F) to 27°C (80.6°F), providing a comfortable climate for outdoor pursuits and exploration. This period also experiences lower humidity levels, adding to the overall pleasant conditions.

The rainfall pattern that was present in the previous months continues, albeit with significantly less precipitation. The southern islands like Rarotonga and Mangaia see further reduction in rainfall, typically averaging below 150mm (5.91"). Meanwhile, the northern islands such as Rakahanga and Pukapuka continue to experience relatively lower precipitation levels.

By May, the cyclone season in the South Pacific has officially ended, substantially reducing the risk of encountering these severe weather events. However, as always, it is prudent to stay aware of local weather forecasts during travel.

Compared to the preceding month of April, May brings further decreases in both temperatures and rainfall, creating a more stable and predictable weather pattern. As we look forward to June, this pattern remains largely consistent, with average temperatures and rainfall remaining relatively steady. The month of May, therefore, represents a period of stable, pleasant weather, marking the onset of the cooler and drier season in the Cook Islands.

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• Roto - May »
  The months with the lowest UV index in Roto are January through December, with an average maximum UV index of 7. The months with the highest UV index in Roto are January through December, with an average maximum UV index of 7.
• Tauhunu - May »
  January through June, October through December, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater in Tauhunu. The months with the highest UV index in Tauhunu are January through December, with an average maximum UV index of 7.
• Mapumai - May »
  In Mapumai in May, during 17 rainfall days, 99mm (3.9") of precipitation is typically accumulated. Even though temperatures drop, May does not compromise on the coveted sunshine hours, maintaining Mapumai's reputation as a sun-drenched locale.
• Avarua District - May »
  In Avarua District, Cook Islands, during May, the rain falls for 9 days and regularly aggregates up to 205mm (8.07") of precipitation. In Avarua District during May, the rain falls for 9 days and regularly aggregates up to 205mm (8.07") of precipitation.
• Arutanga - May »
  In Arutanga during May, the rain falls for 18.8 days and regularly aggregates up to 114mm (4.49") of precipitation. In May, Arutanga experiences a noticeable drop in temperature, making it a relatively colder month compared to the rest of the year.
• Omoka Village - May »
  The months with the warmest seawater in Omoka Village are January through June, October through December, with an average sea temperature of 29°C (84.2°F). Omoka Village's warmest period falls in January, March through July, September through December, when the average high-temperatures ascend to 31°C (87.8°F).
• Mangarei Village - May »
  On the last day of the month, in Mangarei Village sunrise is at 06:58 and sunset at 17:58 -10. On the first day of May in Mangarei Village sunrise is at 06:47 and sunset at 18:08.
• Oneroa Village - May »
  On the first day of May in Oneroa Village sunrise is at 06:50 and sunset at 18:07. In Oneroa Village in May, during 9 rainfall days, 177mm (6.97") of precipitation is typically accumulated.
• Tautu - May »
  In Tautu in May, during 18.8 rainfall days, 114mm (4.49") of precipitation is typically accumulated. In Tautu during May, the rain falls for 18.8 days and regularly aggregates up to 114mm (4.49") of precipitation.
• Nukuao - May »
  January through March, May, November and December, with an average maximum UV index of 7, are months with the highest UV index in Nukuao, Cook Islands. On the last day of May, in Nukuao sunrise is at 06:57 and sunset at 17:56 -10.
• Ngatiarua - May »
  On the last day of the month, in Ngatiarua sunrise is at 07:00 and sunset at 18:00 -10. The months with the highest UV index in Ngatiarua are January through March, May, November and December, with an average maximum UV index of 7.
• Karanga Village - May »
  In Karanga Village during the entire year, the rain falls for 211.1 days and collects up to 1084mm (42.68") of precipitation. On the last day of May, in Karanga Village, Cook Islands, sunrise is at 07:03 and sunset at 17:55 -10.