Donegal weather in December 2025

Expect daytime maximum temperatures of 7°C in Donegal, Ireland in December based on long-term weather averages. There is 1 hour of sunshine per day on average with 24 days with some rainfall and typically 173 mm of rainfall in the month.

  • 7°C maximum daytime temperature in December in Donegal7
    7°C max day temperature
  • 1 hour of sunshine per day
  • 24 days with some rainfall in December in Donegal24
    24 days with some rainfall
  • 2°C minimum night-time temperature in December in Donegal2
    2°C min night temperature
  • 7 hours of daylight per day in December in Donegal7
    7 hours of daylight per day
  • No heat & humidity in December in Donegal0
    No heat & humidity
  • 173 mm monthly rainfall in December in Donegal173
    173 mm of monthly rainfall
  • No UV (maximum) index in December in Donegal0
    No UV (Maximum) Index UV index
  • 10°C sea temperature in December in Donegal10
    10°C sea temperature

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The December weather guide for Ireland (Donegal) 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 cold is it in Donegal in December?

Daytime temperatures usually reach 7°C in Donegal in December, falling to 2°C at night.

How sunny is it in Donegal in December?

There are normally 1 hour of bright sunshine each day in Donegal in December - that's 15% of daylight hours.

Is the sea cold around Donegal in December?

The average sea temperature around Donegal in December is 10°C.

Does it rain in Donegal in December?

There are usually 24 days with some rain in Donegal in December and the average monthly rainfall is 173mm.

Donegal December sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 08:32 16:11
Tuesday, 16th December 2025 08:50 16:06
Wednesday, 31st December 2025 08:55 16:16

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