Ireland weather in May 2025

Expect 15°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Ireland in May. Check more long-term weather averages for Ireland in May before you book your next holiday to Ireland in 2025/2026.

  • 15°C maximum daytime temperature in May in Ireland (Dublin)15
    15°C max day temperature
  • 6 hours of sunshine per day
  • 16 days with some rainfall in May in Ireland (Dublin)16
    16 days with some rainfall
  • 7°C minimum night-time temperature in May in Ireland (Dublin)7
    7°C min night temperature
  • 16 hours of daylight per day in May in Ireland (Dublin)16
    16 hours of daylight per day
  • No heat & humidity in May in Ireland (Dublin)0
    No heat & humidity
  • 55 mm monthly rainfall in May in Ireland (Dublin)55
    55 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in May in Ireland (Dublin)5
    5 (Moderate) UV index
  • 10°C sea temperature in May in Ireland (Dublin)10
    10°C sea temperature

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The May weather guide for Ireland (Dublin) 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.

Top Ireland destinations

Below are average maximum temperatures at popular countries, regions and places in Ireland in May. Select a holiday destination to see more weather parameters.

All Ireland destinations

Metric (°C / mm)  |  Imperial (°F / inches)

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More about Ireland

How warm is it in Ireland in May?

Daytime temperatures usually reach 15°C in Dublin, Ireland in May, falling to 7°C at night.

How sunny is it in Ireland in May?

There are normally 6 hours of bright sunshine each day in Dublin, Ireland in May - that's 38% of daylight hours.

Is the sea cold around Ireland in May?

The average sea temperature around Dublin, Ireland in May is 10°C.

Does it rain in Ireland in May?

There are usually 16 days with some rain in Dublin, Ireland in May and the average monthly rainfall is 55mm.

Ireland May sunrise & sunset times

Browse the sunrise and sunset times for Ireland in May 2025. Select a month to view Ireland sunrise and sunset times for the next 12 months. The Ireland sunrise and sunset times shown below are for Dublin.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 04:51 19:55
Friday, 16th May 2025 04:23 20:20
Saturday, 31st May 2025 04:04 20:42

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