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Penrhyn weather in September 2025
Expect 31°C daytime maximum temperatures in the shade with on average -9999 hours of sunshine per day in Penrhyn in September. Check more long-term weather averages for Penrhyn in September before you book your next holiday to Cook Islands in 2025/2026.
- 3131°C max day temperature
- 66 days with some rainfall
- 2424°C min night temperature
- 1212 hours of daylight per day
- HHigh heat & humidity
- 135135 mm of monthly rainfall
- 1111+ (Extreme) UV index
- 2828°C sea temperature
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Recommended for the Cook Islands
The September weather guide for Cook Islands (Penrhyn) 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)
How hot is it in Penrhyn in September?
Daytime temperatures usually reach 31°C in Penrhyn in September with high heat and humidity, falling to 24°C at night.
How warm is the sea around Penrhyn in September?
The average sea temperature around Penrhyn in September is 28°C.
Does it rain in Penrhyn in September?
There are usually 6 days with some rain in Penrhyn in September and the average monthly rainfall is 135mm.
Penrhyn September sunrise & sunset times
Browse the sunrise and sunset times for Penrhyn in September 2025. Select a month to view Penrhyn sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Monday, 1st September 2025 | 06:34 | 18:30 |
Monday, 15th September 2025 | 06:26 | 18:29 |
Tuesday, 30th September 2025 | 06:17 | 18:27 |
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