Dún Laoghaire monthly weather averages

  • Average daytime temperature

    The bar chart below shows the average monthly peak daytime temperatures at Dún Laoghaire

    Dún Laoghaire average temperature chart
    Average monthly temperatures in Dún Laoghaire (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C 7.7 7.6 9.4 11.3 14.1 17.1 18.8 18.5 16.6 13.8 10 8.5
    °F 45.9 45.7 48.9 52.4 57.4 62.8 65.8 65.3 61.9 56.8 49.9 47.4

    Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

  • Average rainfall & rainy days

    The graph below shows the average rainfall and number of rainy days per month.

    Average monthly rainfall in Dún Laoghaire (mm and inches)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    mm 79 62 62 52 62 55 52 70 75 80 79 94
    inches 3.1 2.4 2.4 2 2.5 2.2 2 2.8 3 3.1 3.1 3.7
    Rainy days 18 15 16 14 16 14 14 16 15 17 16 17
  • Average daily sunshine

    The bar chart below shows the average daily sunshine hours in Dún Laoghaire

    Average daily sunshine Dún Laoghaire
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Hrs sunshine 2.1 2.9 4 5.8 6.8 6.8 6.1 5.7 4.8 3.6 2.7 2
  • Day / night temperatures

    The graph below shows the daily range of temperatures for each month.

    Maximum and minimum daily temperatures in Dún Laoghaire (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Min °C 2.8 2.7 3.3 4.5 6.9 9.7 11.5 11.3 9.9 7.9 4.5 3.6
    Max °C 7.9 7.8 9.6 11.5 14.3 17.3 19 18.7 16.8 13.9 10.1 8.7
    Min °F 37 36.8 37.9 40.1 44.4 49.5 52.6 52.3 49.7 46.2 40.1 38.4
    Max °F 41.5 41.4 43.5 46.4 51.1 56.3 59.4 59 55.9 51.6 45.1 43
  • Sea temperature

    The graph below shows the average sea temperature.

    Average sea temperature around Dún Laoghaire in degrees centigrade and fahrenheit
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C 8.9 7.9 7.7 8.6 10.5 12.8 14.8 15.7 15.3 14.1 12.3 10.5
    °F 48 46.2 45.9 47.5 50.8 55.1 58.7 60.2 59.5 57.3 54.2 50.9
  • Wind speed

    The graph below shows the average wind speed.

    Average wind speed in Dún Laoghaire (mph and kmh)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    km/h 24 23 22 19 17 16 16 16 18 20 22 23
    mph 15 14 14 12 11 10 10 10 11 12 14 14

    A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

  • Relative humidity

    The graph below shows the average relative humidity.

    Average relative humidity in Dún Laoghaire
    Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    87% 85% 82% 80% 80% 80% 80% 82% 83% 86% 87% 88%

Other monthly averages

Dún Laoghaire weather stats

Dún Laoghaire weather statistics
Hottest month: July 18.8°C 65.8°F
Driest month: April 52mm 2ins
Sunniest month: May 6.8hrs
Coldest month: February 7.6°C 45.7°F
Wettest month: December 94mm 3.7ins
Warmest sea: August 15.7°C 60.3°F
Map showing location of Dún Laoghaire (53.29395, -6.13586)

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