Belfast weather in January 2025

Expect 45°F daytime maximum temperatures in the shade with on average 2 hours of sunshine per day in Belfast in January. Check more long-term weather averages for Belfast in January before you book your next holiday to Northern Ireland in 2025/2026.

  • 45°F maximum daytime temperature in January in Belfast45
    45°F max day temperature
  • 2 hours of sunshine per day
  • 20 days with some rainfall in January in Belfast20
    20 days with some rainfall
  • 34°F minimum night-time temperature in January in Belfast34
    34°F min night temperature
  • 8 hours of daylight per day in January in Belfast8
    8 hours of daylight per day
  • No heat & humidity in January in Belfast0
    No heat & humidity
  • 4.0 inches monthly rainfall in January in Belfast4.0
    4.0 inches of monthly rainfall
  • No UV (maximum) index in January in Belfast0
    No UV (Maximum) Index UV index
  • 48°F sea temperature in January in Belfast48
    48°F sea temperature

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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.

Metric (°C)  |  Imperial (°F)

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More about the UK

How cold is it in Belfast in January?

Daytime temperatures usually reach 45°F in Belfast in January, falling to 34°F at night.

How sunny is it in Belfast in January?

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

How warm is the sea around Belfast in January?

The average sea temperature around Belfast in January is 48°F.

Does it rain in Belfast in January?

There are usually 20 days with some rain in Belfast in January and the average monthly rainfall is 4.0 inches.

Belfast January sunrise & sunset times

Browse the sunrise and sunset times for Belfast in January 2025. Select a month to view Belfast sunrise and sunset times for the next 12 months.

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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