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

Northern Ireland by month

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