Caernarfon weather in January 2026

Expect daytime maximum temperatures of 45°F in Caernarfon, Wales in January based on long-term weather averages. There is 1 hour of sunshine per day on average with 20 days with some rainfall and typically 6.5 inches of rainfall in the month.

  • 45°F maximum daytime temperature in January in Caernarfon45
    45°F max day temperature
  • 1 hour of sunshine per day
  • 20 days with some rainfall in January in Caernarfon20
    20 days with some rainfall
  • 36°F minimum night-time temperature in January in Caernarfon36
    36°F min night temperature
  • 8 hours of daylight per day in January in Caernarfon8
    8 hours of daylight per day
  • No heat & humidity in January in Caernarfon0
    No heat & humidity
  • 6.5 inches monthly rainfall in January in Caernarfon6.5
    6.5 inches of monthly rainfall
  • No UV (maximum) index in January in Caernarfon0
    No UV (Maximum) Index UV index
  • 46°F sea temperature in January in Caernarfon46
    46°F sea temperature

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The January weather guide for Wales (Caernarfon) 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 Caernarfon in January?

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

How sunny is it in Caernarfon in January?

There are normally 1 hour of bright sunshine each day in Caernarfon in January - that's 17% of daylight hours.

How warm is the sea around Caernarfon in January?

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

Does it rain in Caernarfon in January?

There are usually 20 days with some rain in Caernarfon in January and the average monthly rainfall is 6.5 inches.

Caernarfon January sunrise & sunset times

Browse the sunrise and sunset times for Caernarfon in January 2026. Select a month to view Caernarfon sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st January 2026 08:31 16:10
Friday, 16th January 2026 08:22 16:32
Saturday, 31st January 2026 08:03 16:59

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