Donegal weather in May 2025

Expect 57°F daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Donegal in May. Check more long-term weather averages for Donegal in May before you book your next holiday to Ireland in 2025/2026.

  • 57°F maximum daytime temperature in May in Donegal57
    57°F max day temperature
  • 5 hours of sunshine per day
  • 19 days with some rainfall in May in Donegal19
    19 days with some rainfall
  • 41°F minimum night-time temperature in May in Donegal41
    41°F min night temperature
  • 16 hours of daylight per day in May in Donegal16
    16 hours of daylight per day
  • No heat & humidity in May in Donegal0
    No heat & humidity
  • 3.6 inches monthly rainfall in May in Donegal3.6
    3.6 inches of monthly rainfall
  • UV (maximum) index 5 (Moderate) in May in Donegal5
    5 (Moderate) UV index
  • 52°F sea temperature in May in Donegal52
    52°F sea temperature

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The May 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)  |  Imperial (°F)

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More about Ireland

How warm is it in Donegal in May?

Daytime temperatures usually reach 57°F in Donegal in May, falling to 41°F at night.

How sunny is it in Donegal in May?

There are normally 5 hours of bright sunshine each day in Donegal in May - that's 32% of daylight hours.

How warm is the sea around Donegal in May?

The average sea temperature around Donegal in May is 52°F.

Does it rain in Donegal in May?

There are usually 19 days with some rain in Donegal in May and the average monthly rainfall is 3.6 inches.

Donegal May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 04:53 20:07
Friday, 16th May 2025 04:24 20:34
Saturday, 31st May 2025 04:04 20:57

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