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.

  • 31°C maximum daytime temperature in September in Penrhyn31
    31°C max day temperature
  • 6 days with some rainfall in September in Penrhyn6
    6 days with some rainfall
  • 24°C minimum night-time temperature in September in Penrhyn24
    24°C min night temperature
  • 12 hours of daylight per day in September in Penrhyn12
    12 hours of daylight per day
  • High heat & humidity in September in PenrhynH
    High heat & humidity
  • 135 mm monthly rainfall in September in Penrhyn135
    135 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Penrhyn11
    11+ (Extreme) UV index
  • 28°C sea temperature in September in Penrhyn28
    28°C sea temperature

More about the Penrhyn

Penrhyn by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for the Cook Islands

Travel Up: Top offers on flights worldwide

  • Check out top flight deals & low fares from popular airlines
  • Search for return & one-way flights or multi-city trips
  • Airlines include BA, Virgin Atlantic, United & Turkish Airlines
Go to Travel Up deal >>

View all Travel Up offers

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)

Back to top

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

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^