Cardiff weather in January 2025

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

  • 45°F maximum daytime temperature in January in Cardiff45
    45°F max day temperature
  • 2 hours of sunshine per day
  • 20 days with some rainfall in January in Cardiff20
    20 days with some rainfall
  • 36°F minimum night-time temperature in January in Cardiff36
    36°F min night temperature
  • 8 hours of daylight per day in January in Cardiff8
    8 hours of daylight per day
  • No heat & humidity in January in Cardiff0
    No heat & humidity
  • 4.1 inches monthly rainfall in January in Cardiff4.1
    4.1 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in January in Cardiff1
    1 (Low) UV index
  • 46°F sea temperature in January in Cardiff46
    46°F sea temperature

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The January weather guide for Wales (Cardiff) 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 Wales

How cold is it in Cardiff in January?

Daytime temperatures usually reach 45°F in Cardiff in January, falling to 36°F at night.

How sunny is it in Cardiff in January?

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

How warm is the sea around Cardiff in January?

The average sea temperature around Cardiff in January is 46°F.

Does it rain in Cardiff in January?

There are usually 20 days with some rain in Cardiff in January and the average monthly rainfall is 4.1 inches.

Cardiff January sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st January 2025 08:18 16:15
Thursday, 16th January 2025 08:10 16:35
Friday, 31st January 2025 07:52 17:01

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