Manihiki weather in September 2025

Expect 30°C daytime maximum temperatures in the shade with on average -9999 hours of sunshine per day in Manihiki in September. Check more long-term weather averages for Manihiki in September before you book your next holiday to Cook Islands in 2025/2026.

  • 30°C maximum daytime temperature in September in Manihiki30
    30°C max day temperature
  • 5 days with some rainfall in September in Manihiki5
    5 days with some rainfall
  • 24°C minimum night-time temperature in September in Manihiki24
    24°C min night temperature
  • 12 hours of daylight per day in September in Manihiki12
    12 hours of daylight per day
  • High heat & humidity in September in ManihikiH
    High heat & humidity
  • 141 mm monthly rainfall in September in Manihiki141
    141 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Manihiki11
    11+ (Extreme) UV index
  • 28°C sea temperature in September in Manihiki28
    28°C sea temperature

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The September weather guide for Cook Islands (Manihiki) 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.

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

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How hot is it in Manihiki in September?

Daytime temperatures usually reach 30°C in Manihiki in September with high heat and humidity, falling to 24°C at night.

How warm is the sea around Manihiki in September?

The average sea temperature around Manihiki in September is 28°C.

Does it rain in Manihiki in September?

There are usually 5 days with some rain in Manihiki in September and the average monthly rainfall is 141mm.

Manihiki September sunrise & sunset times

Browse the sunrise and sunset times for Manihiki in September 2025. Select a month to view Manihiki sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:46 18:41
Monday, 15th September 2025 06:38 18:40
Tuesday, 30th September 2025 06:28 18:40

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