October weather forecast
Cook Islands

October in the Cook Islands marks a further progression in the transition from the dry to the wet season. During this month, average temperatures continue to rise, generally varying between 20°C (68°F) to 27°C (80.6°F). The increasing temperatures and a slow rise in humidity start to bring back the feel of the tropical climate that characterizes the wet season.

Rainfall during October continues to increase compared to the preceding month. The southern islands, including Rarotonga and Mangaia, typically experience rainfall levels above 150mm (5.91"), demonstrating a clear shift towards the wetter conditions of the upcoming season. The northern islands, such as Suwarrow and Nassau, also see an increase in rainfall, although their totals remain relatively lower than those of the southern islands.

Although October is outside the typical South Pacific cyclone season, as the wet season approaches, it's prudent to start keeping a closer eye on local weather forecasts for any unexpected weather events.

When comparing October to the previous month of September, both average temperatures and rainfall levels are on the rise, signalling the ongoing transition to the wet season. Looking ahead to November, this trend continues, with further increases in rainfall and a steady rise in temperatures. October, therefore, is a month of change in the Cook Islands' weather pattern, marking the transition from the cooler and drier conditions to the warm, tropical climate of the wet season.

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• Roto - October »
  The transition from September to October in Roto sees an average high-temperature of a still moderately hot 28.1°C (82.6°F), indicating a minor variance from the prior month. In Roto, during October, the rain falls for 24.9 days and regularly aggregates up to 131mm (5.16") of precipitation.
• Tauhunu - October »
  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 humidity in Tauhunu are February through October, with an average relative humidity of 76%.
• Mapumai - October »
  In Mapumai in October, during 16 rainfall days, 82mm (3.23") of precipitation is typically accumulated. The months with the lowest UV index in Mapumai are April, June through October, with an average maximum UV index of 6.
• Avarua District - October »
  In Avarua District in October, the average water temperature is 25.3°C (77.5°F). In October, the rain falls for 5 days.
• Arutanga - October »
  July and October, with an average of 6.9h of sunshine, are months with the least sunshine in Arutanga, Cook Islands. In Arutanga during October, the rain falls for 16.3 days and regularly aggregates up to 87mm (3.43") of precipitation.
• Omoka Village - October »
  The warmest months in Omoka Village are January, March through July, September through December, with an average high-temperature of 31°C (87.8°F). In Omoka Village, Cook Islands, in October, during 6 rainfall days, 143mm (5.63") of precipitation is typically accumulated.
• Mangarei Village - October »
  In October, the average sea temperature in Mangarei Village, Cook Islands, is 26°C (78.8°F). Mangarei Village observes a minor difference in average high-temperatures between September's 24.2°C (75.6°F) and October's 24.5°C (76.1°F).
• Oneroa Village - October »
  The months with the highest UV index in Oneroa Village are January through March, October through December, with an average maximum UV index of 12. July through October, with an average sea temperature of 24°C (75.2°F), are months with the coldest seawater in Oneroa Village.
• Tautu - October »
  In Tautu in October, it is raining for 16.3 days, with typically 87mm (3.43") of accumulated precipitation. January through May, October through December, with an average maximum UV index of 7, are months with the highest UV index in Tautu, Cook Islands.
• Nukuao - October »
  On the first day of October in Nukuao, Cook Islands, sunrise is at 06:09 and sunset at 18:27. April, June through October, with an average maximum UV index of 6, are months with the lowest UV index in Nukuao, Cook Islands.
• Ngatiarua - October »
  The months with the lowest UV index in Ngatiarua are April, June through October, with an average maximum UV index of 6. In Ngatiarua the average sunshine duration in October is 7.7h.
• Karanga Village - October »
  The months with the lowest UV index in Karanga Village are April, June through October, with an average maximum UV index of 6. The month of October in Karanga Village shows a minor drop from daytime temperatures, generally recording a low average of 23.7°C (74.7°F).