Belfast weather in January 2023

  • 7°C maximum daytime temperature in January in Belfast7
    7°C max day temperature
  • 2 hours of sunshine per day
  • 20 days with some rainfall in January in Belfast20
    20 days with some rainfall
  • 1°C minimum night-time temperature in January in Belfast1
    1°C 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
  • 101 mm monthly rainfall in January in Belfast101
    101 mm of monthly rainfall
  • No UV (maximum) index in January in Belfast0
    No UV (Maximum) Index UV index
  • 9°C sea temperature in January in Belfast9
    9°C sea temperature
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Recommended for Northern Ireland

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.

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

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More about the UK

How cold is it in Belfast in January?

Daytime temperatures usually reach 7°C in Belfast in January, falling to 1°C 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.

Is the sea cold around Belfast in January?

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

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 101mm.

Belfast January sunrise & sunset times

Browse the sunrise and sunset times for Belfast in January 2023. Select a month to view Belfast sunrise and sunset times for the next 12 months.


Date Sunrise times Sunset times
Sunday, 1st January 2023 08:46 16:08
Monday, 16th January 2023 08:36 16:31
Tuesday, 31st January 2023 08:15 17:00

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