Northern Ireland weather in January 2025

Expect 7°C daytime maximum temperatures in the shade with on average 2 hours of sunshine per day in Northern Ireland in January. Check more long-term weather averages for Northern Ireland in January before you book your next holiday to Northern Ireland in 2025/2026.

  • 7°C maximum daytime temperature in January in Northern Ireland (Belfast)7
    7°C max day temperature
  • 2 hours of sunshine per day
  • 20 days with some rainfall in January in Northern Ireland (Belfast)20
    20 days with some rainfall
  • 1°C minimum night-time temperature in January in Northern Ireland (Belfast)1
    1°C min night temperature
  • 8 hours of daylight per day in January in Northern Ireland (Belfast)8
    8 hours of daylight per day
  • No heat & humidity in January in Northern Ireland (Belfast)0
    No heat & humidity
  • 101 mm monthly rainfall in January in Northern Ireland (Belfast)101
    101 mm of monthly rainfall
  • No UV (maximum) index in January in Northern Ireland (Belfast)0
    No UV (Maximum) Index UV index
  • 9°C sea temperature in January in Northern Ireland (Belfast)9
    9°C sea temperature

More about Northern Ireland

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The January weather guide for Northern Ireland (Belfast) 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 Northern Ireland destinations

Below are average maximum temperatures at popular destinations in Northern Ireland in January. Select a destination to see more weather parameters.

All Northern Ireland destinations

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

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More about the UK

How cold is it in Northern Ireland in January?

Daytime temperatures usually reach 7°C in Belfast, Northern Ireland in January, falling to 1°C at night.

How sunny is it in Northern Ireland in January?

There are normally 2 hours of bright sunshine each day in Belfast, Northern Ireland in January - that's 20% of daylight hours.

Is the sea cold around Northern Ireland in January?

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

Does it rain in Northern Ireland in January?

There are usually 20 days with some rain in Belfast, Northern Ireland in January and the average monthly rainfall is 101mm.

Northern Ireland January sunrise & sunset times

Browse the sunrise and sunset times for Northern Ireland in January 2025. Select a month to view Northern Ireland sunrise and sunset times for the next 12 months. The Northern Ireland sunrise and sunset times shown below are for Belfast.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st January 2025 08:46 16:09
Thursday, 16th January 2025 08:36 16:32
Friday, 31st January 2025 08:14 17:01

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