Ireland weather in January 2026

Expect 8°C daytime maximum temperatures in the shade with on average 2 hours of sunshine per day in Ireland in January based on long-term weather averages. There is usually 18 days with some rainfall and 62 mm of average monthly rainfall in January.

  • 8°C maximum daytime temperature in January in Ireland (Dublin)8
    8°C max day temperature
  • 2 hours of sunshine per day
  • 18 days with some rainfall in January in Ireland (Dublin)18
    18 days with some rainfall
  • 3°C minimum night-time temperature in January in Ireland (Dublin)3
    3°C min night temperature
  • 8 hours of daylight per day in January in Ireland (Dublin)8
    8 hours of daylight per day
  • No heat & humidity in January in Ireland (Dublin)0
    No heat & humidity
  • 62 mm monthly rainfall in January in Ireland (Dublin)62
    62 mm of monthly rainfall
  • No UV (maximum) index in January in Ireland (Dublin)0
    No UV (Maximum) Index UV index
  • 9°C sea temperature in January in Ireland (Dublin)9
    9°C sea temperature

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The January weather guide for Ireland (Dublin) 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.

Top Ireland destinations

Below are average maximum temperatures at popular countries, regions and places in Ireland in January. Select a holiday destination to see more weather parameters.

All Ireland destinations

Metric (°C / mm)  |  Imperial (°F / inches)

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More about Ireland

How warm is it in Ireland in January?

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

How sunny is it in Ireland in January?

There are normally 2 hours of bright sunshine each day in Dublin, Ireland in January - that's 22% of daylight hours.

Is the sea cold around Ireland in January?

The average sea temperature around Dublin, Ireland in January is 9°C.

Does it rain in Ireland in January?

There are usually 18 days with some rain in Dublin, Ireland in January and the average monthly rainfall is 62mm.

Ireland January sunrise & sunset times

Browse the sunrise and sunset times for Ireland in January 2026. Select a month to view Ireland sunrise and sunset times for the next 12 months. The Ireland sunrise and sunset times shown below are for Dublin.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st January 2026 08:40 16:17
Friday, 16th January 2026 08:31 16:39
Saturday, 31st January 2026 08:11 17:06

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