Chatham Island weather in December 2025

Expect 18°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Chatham Island in December based on long-term weather averages. There is usually 12 days with some rainfall and 56 mm of average monthly rainfall in December.

  • 18°C maximum daytime temperature in December in Chatham Island18
    18°C max day temperature
  • 5 hours of sunshine per day
  • 12 days with some rainfall in December in Chatham Island12
    12 days with some rainfall
  • 15°C minimum night-time temperature in December in Chatham Island15
    15°C min night temperature
  • 15 hours of daylight per day in December in Chatham Island15
    15 hours of daylight per day
  • No heat & humidity in December in Chatham Island0
    No heat & humidity
  • 56 mm monthly rainfall in December in Chatham Island56
    56 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in December in Chatham Island10
    10 (Very High) UV index
  • 13°C sea temperature in December in Chatham Island13
    13°C sea temperature

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The December 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 / mm)  |  Imperial (°F / inches)

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How hot is it in Chatham Island in December?

Daytime temperatures usually reach 18°C in Chatham Island in December, falling to 15°C at night.

How sunny is it in Chatham Island in December?

There are normally 5 hours of bright sunshine each day in Chatham Island in December - that's 34% of daylight hours.

How warm is the sea around Chatham Island in December?

The average sea temperature around Chatham Island in December is 13°C.

Does it rain in Chatham Island in December?

There are usually 12 days with some rain in Chatham Island in December and the average monthly rainfall is 56mm.

Chatham Island December sunrise & sunset times

Browse the sunrise and sunset times for Chatham Island in December 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 December 2025 04:44 19:57
Tuesday, 16th December 2025 04:43 20:11
Wednesday, 31st December 2025 04:51 20:17

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