Dun Laoghaire Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Dun Laoghaire.
Climate overview of Dun Laoghaire
Temperatures in Dun Laoghaire, Dublin County, Ireland, shift moderately through the seasons. The warmest month is July at 19°C (66°F), and the coolest is February at 9°C (48°F).
The city receives around 961 mm (38 in) of rainfall per year. November is the wettest month and March the driest. May is the sunniest month, averaging 6.3 hours of sunshine per day.
Dun Laoghaire Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Dun Laoghaire — and find the best time to visit.
Monthly Temperature in Dun Laoghaire
In Dun Laoghaire, seasonal changes bring about a moderate variation in temperatures. On average, daytime temperatures range from a pleasant 19°C (66°F) in July to a chilly 9°C (48°F) in February.
Nighttime temperatures range from 13°C (55°F) in July to 4°C (39°F) in February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Dun Laoghaire
Generally, Dun Laoghaire receives mid-range precipitation levels, with 961 mm (38 in) annually. The wettest period in Dun Laoghaire occurs in November, which receives around 100 mm (3.9 in) of precipitation. During the driest month, March, Dun Laoghaire experiences moderate rainfall, totaling 66 mm (2.6 in). The consistent precipitation levels throughout the year contribute to a relatively stable climate. For more details, please visit our Dun Laoghaire Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Dun Laoghaire
In Dun Laoghaire, summer days are longer and more sunny, with daily sunshine hours peaking at 6.3 hours in May. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 1.7 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Water Temperature in Dun Laoghaire
The mean water temperature over the year ranges from 8°C (46°F) in March to 15°C (59°F) in August.
Water temperature over the year
Humidity in Dun Laoghaire by Month
The relative humidity is high throughout the year in Dun Laoghaire.
The city experiences its highest humidity in December, reaching 83%. In April, the humidity drops to its lowest level at 68%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Dun Laoghaire
The average wind speed over the year ranges from 4 m/s (8 knots) to 6 m/s (12 knots). It is lower in May, June, July, August and September and higher in January, February, March and December. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Dun Laoghaire
Frequently asked questions about the climate in Dun Laoghaire
What is the best time to visit Dun Laoghaire?
July and August typically offer the most optimal weather in Dun Laoghaire. In contrast, January, February, March, November and December tend to have less optimal conditions.
What temperatures can I expect in Dun Laoghaire?
Daytime highs range from 9°C (48°F) in February to 19°C (66°F) in July. Nighttime lows range from 4°C (39°F) to 13°C (55°F).
How much rain does Dun Laoghaire get?
Annual rainfall is around 961 mm (38 in). November is the wettest month with 100 mm (3.9 in), while March is the driest with 66 mm (2.6 in).
How sunny is Dun Laoghaire?
Dun Laoghaire receives around 1,432 hours of sunshine per year. May is the sunniest month with 188 hours, while December is the cloudiest with just 51 hours.
Dun Laoghaire 3-Day Forecast
Dun Laoghaire 3-Day Forecast
Dun Laoghaire on the map
Dun Laoghaire is highlighted — select any city to see its climate.
Popular this month
Where to go in July — average daytime high across popular destinations.
Cork
19°C (66°F) Kilkenny
20°C (68°F) Dublin20°C (68°F) Kenmare
19°C (66°F) Galway20°C (68°F) Killarney19°C (66°F) Westport19°C (66°F) Doolin18°C (64°F) 
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