Dún Laoghaire weather in June
Temperature, sea and sunshine in June: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in June
Poor
Best time to visit: April – September
What is the weather like in Dún Laoghaire in June?
In June, Dún Laoghaire is mild: daytime highs average 17 °C, and nights cool down to about 11 °C. The sea averages 13.3 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 69 mm in total. All in all, June is not an ideal month for a holiday in Dún Laoghaire.
June compared
How the weather changes from May to July. Tap a month to open it.
More details for June
- Daylight
- 16 h 57 min04:56 – 21:53
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 20 km/haverage daily peakAll months
- Cloud cover
- 72 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+1Europe/Dublin
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %0 %
- Sunshineweight 20 %43 %
- Few rainy daysweight 20 %42 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in June
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
- Rain jacket or umbrella
Dún Laoghaire in June: quick answers
Is Dún Laoghaire hot in June?
No. In June, Dún Laoghaire is mild: daytime highs average 17 °C and nights drop to about 11 °C.
Can you swim in Dún Laoghaire in June?
Only if you don't mind cold water: in June the sea averages just 13.3 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Dún Laoghaire in June?
Rain is frequent, with about 12 rainy days and 69 mm in total.
Dún Laoghaire month by month
The whole year in Dún LaoghaireAll destinations: IrelandWhere to go in JuneSea temperature in June
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences