Dundalk weather in December 2025

Expect daytime maximum temperatures of 8°C in Dundalk in December based on long-term weather averages. There is 1 hour of sunshine per day on average with 18 days with some rainfall and typically 87 mm of rainfall in the month.

  • 8°C maximum daytime temperature in December in Dundalk8
    8°C max day temperature
  • 1 hour of sunshine per day
  • 18 days with some rainfall in December in Dundalk18
    18 days with some rainfall
  • 3°C minimum night-time temperature in December in Dundalk3
    3°C min night temperature
  • 7 hours of daylight per day in December in Dundalk7
    7 hours of daylight per day
  • No heat & humidity in December in Dundalk0
    No heat & humidity
  • 87 mm monthly rainfall in December in Dundalk87
    87 mm of monthly rainfall
  • No UV (maximum) index in December in Dundalk0
    No UV (Maximum) Index UV index
  • 9°C sea temperature in December in Dundalk9
    9°C sea temperature

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The December weather guide for Ireland (Dundalk) 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 / mm)  |  Imperial (°F / inches)

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More about Ireland

How warm is it in Dundalk in December?

Daytime temperatures usually reach 8°C in Dundalk in December, falling to 3°C at night.

How sunny is it in Dundalk in December?

There are normally 1 hour of bright sunshine each day in Dundalk in December - that's 19% of daylight hours.

Is the sea cold around Dundalk in December?

The average sea temperature around Dundalk in December is 9°C.

Does it rain in Dundalk in December?

There are usually 18 days with some rain in Dundalk in December and the average monthly rainfall is 87mm.

Dundalk December sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 08:21 16:08
Tuesday, 16th December 2025 08:39 16:03
Wednesday, 31st December 2025 08:45 16:13

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