Achill Island weather in May 2025

Expect 14°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Achill Island in May. Check more long-term weather averages for Achill Island in May before you book your next holiday to Ireland in 2025/2026.

  • 14°C maximum daytime temperature in May in Achill Island14
    14°C max day temperature
  • 6 hours of sunshine per day
  • 16 days with some rainfall in May in Achill Island16
    16 days with some rainfall
  • 7°C minimum night-time temperature in May in Achill Island7
    7°C min night temperature
  • 16 hours of daylight per day in May in Achill Island16
    16 hours of daylight per day
  • No heat & humidity in May in Achill Island0
    No heat & humidity
  • 76 mm monthly rainfall in May in Achill Island76
    76 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in May in Achill Island5
    5 (Moderate) UV index
  • 11°C sea temperature in May in Achill Island11
    11°C sea temperature

More about Achill Island

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The May weather guide for Ireland (Achill Island) 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 Achill Island in May?

Daytime temperatures usually reach 14°C in Achill Island in May, falling to 7°C at night.

How sunny is it in Achill Island in May?

There are normally 6 hours of bright sunshine each day in Achill Island in May - that's 37% of daylight hours.

Is the sea cold around Achill Island in May?

The average sea temperature around Achill Island in May is 11°C.

Does it rain in Achill Island in May?

There are usually 16 days with some rain in Achill Island in May and the average monthly rainfall is 76mm.

Achill Island May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 05:03 20:12
Friday, 16th May 2025 04:36 20:39
Saturday, 31st May 2025 04:16 21:01

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