Chatham Island weather in September 2025

Expect daytime maximum temperatures of 52°F in Chatham Island, New Zealand in September based on long-term weather averages. There are 4 hours of sunshine per day on average with typically 2.8 inches of rainfall in the month.

  • 52°F maximum daytime temperature in September in Chatham Island52
    52°F max day temperature
  • 4 hours of sunshine per day
  • 3 days with some rainfall in September in Chatham Island3
    3 days with some rainfall
  • 43°F minimum night-time temperature in September in Chatham Island43
    43°F min night temperature
  • 12 hours of daylight per day in September in Chatham Island12
    12 hours of daylight per day
  • No heat & humidity in September in Chatham Island0
    No heat & humidity
  • 2.8 inches monthly rainfall in September in Chatham Island2.8
    2.8 inches of monthly rainfall
  • UV (maximum) index 3 (Moderate) in September in Chatham Island3
    3 (Moderate) UV index
  • 52°F sea temperature in September in Chatham Island52
    52°F sea temperature

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The September weather guide for New Zealand (Chatham Island) 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)  |  Imperial (°F)

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How warm is it in Chatham Island in September?

Daytime temperatures usually reach 52°F in Chatham Island in September, falling to 43°F at night.

How sunny is it in Chatham Island in September?

There are normally 4 hours of bright sunshine each day in Chatham Island in September - that's 30% of daylight hours.

How warm is the sea around Chatham Island in September?

The average sea temperature around Chatham Island in September is 52°F.

Does it ever rain in Chatham Island in September?

There are usually 3 days with some rain in Chatham Island in September and the average monthly rainfall is 2.8 inches.

Chatham Island September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:59 18:04
Monday, 15th September 2025 06:34 18:20
Tuesday, 30th September 2025 06:06 18:37

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