Dundalk weather in May 2025

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

  • 15°C maximum daytime temperature in May in Dundalk15
    15°C max day temperature
  • 6 hours of sunshine per day
  • 16 days with some rainfall in May in Dundalk16
    16 days with some rainfall
  • 6°C minimum night-time temperature in May in Dundalk6
    6°C min night temperature
  • 16 hours of daylight per day in May in Dundalk16
    16 hours of daylight per day
  • No heat & humidity in May in Dundalk0
    No heat & humidity
  • 63 mm monthly rainfall in May in Dundalk63
    63 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in May in Dundalk5
    5 (Moderate) UV index
  • 11°C sea temperature in May in Dundalk11
    11°C sea temperature

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The May 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 May?

Daytime temperatures usually reach 15°C in Dundalk in May, falling to 6°C at night.

How sunny is it in Dundalk in May?

There are normally 6 hours of bright sunshine each day in Dundalk in May - that's 36% of daylight hours.

Is the sea cold around Dundalk in May?

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

Does it rain in Dundalk in May?

There are usually 16 days with some rain in Dundalk in May and the average monthly rainfall is 63mm.

Dundalk May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 04:49 19:58
Friday, 16th May 2025 04:21 20:24
Saturday, 31st May 2025 04:01 20:46

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