Achill Island weather in January 2026

Expect daytime maximum temperatures of 8°C in Achill Island in January based on long-term weather averages. There are 2 hours of sunshine per day on average with 23 days with some rainfall and typically 141 mm of rainfall in the month.

  • 8°C maximum daytime temperature in January in Achill Island8
    8°C max day temperature
  • 2 hours of sunshine per day
  • 23 days with some rainfall in January in Achill Island23
    23 days with some rainfall
  • 3°C minimum night-time temperature in January in Achill Island3
    3°C min night temperature
  • 8 hours of daylight per day in January in Achill Island8
    8 hours of daylight per day
  • No heat & humidity in January in Achill Island0
    No heat & humidity
  • 141 mm monthly rainfall in January in Achill Island141
    141 mm of monthly rainfall
  • No UV (maximum) index in January in Achill Island0
    No UV (Maximum) Index UV index
  • 9°C sea temperature in January in Achill Island9
    9°C sea temperature

More about Achill Island

Achill Island by month

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The January weather guide for Ireland (Achill 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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More about Ireland

How warm is it in Achill Island in January?

Daytime temperatures usually reach 8°C in Achill Island in January, falling to 3°C at night.

How sunny is it in Achill Island in January?

There are normally 2 hours of bright sunshine each day in Achill Island in January - that's 19% of daylight hours.

Is the sea cold around Achill Island in January?

The average sea temperature around Achill Island in January is 9°C.

Does it rain in Achill Island in January?

There are usually 23 days with some rain in Achill Island in January and the average monthly rainfall is 141mm.

Achill Island January sunrise & sunset times

Browse the sunrise and sunset times for Achill Island in January 2026. Select a month to view Achill Island sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st January 2026 08:59 16:29
Friday, 16th January 2026 08:49 16:51
Saturday, 31st January 2026 08:29 17:19

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