Dundalk weather in August 2025

Expect 19°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Dundalk in August. Check more long-term weather averages for Dundalk in August before you book your next holiday to Ireland in 2025/2026.

  • 19°C maximum daytime temperature in August in Dundalk19
    19°C max day temperature
  • 5 hours of sunshine per day
  • 17 days with some rainfall in August in Dundalk17
    17 days with some rainfall
  • 11°C minimum night-time temperature in August in Dundalk11
    11°C min night temperature
  • 15 hours of daylight per day in August in Dundalk15
    15 hours of daylight per day
  • No heat & humidity in August in Dundalk0
    No heat & humidity
  • 72 mm monthly rainfall in August in Dundalk72
    72 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in August in Dundalk5
    5 (Moderate) UV index
  • 15°C sea temperature in August in Dundalk15
    15°C sea temperature

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The August 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 hot is it in Dundalk in August?

Daytime temperatures usually reach 19°C in Dundalk in August, falling to 11°C at night.

How sunny is it in Dundalk in August?

There are normally 5 hours of bright sunshine each day in Dundalk in August - that's 31% of daylight hours.

How warm is the sea around Dundalk in August?

The average sea temperature around Dundalk in August is 15°C.

Does it rain in Dundalk in August?

There are usually 17 days with some rain in Dundalk in August and the average monthly rainfall is 72mm.

Dundalk August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 04:39 20:23
Saturday, 16th August 2025 05:06 19:53
Sunday, 31st August 2025 05:32 19:18

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