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Hourly Forecast
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07:25
Sunrise
19:05
Sunset
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Waxing Gibbous
18:40
Moonrise
05:36
Moonset
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View stargazing scoreWeather in Dún Laoghaire today, September 25, 2026
Dún Laoghaire starts September 25, 2026 looking damp, with rain in the forecast and wetter spells likely at times. Waterproof kit is the safer call for early plans. Early hours look the most unsettled, with rain probability near 60% by 05:00. The thickest cloud arrives around 05:00, reaching about 100%.
Temperatures climb from an overnight low near 14°C toward a daytime high of about 17°C. The air stays humid, with relative humidity between 60% and 86% and the peak around 06:00. A lighter breeze peaks around 05:00 near 5.3 km/h.
Afternoon conditions improve on the morning wet spell, as rain chances fall toward 0% from about 60% earlier. Cloud still reaches roughly 100% near 13:00. Expect visibility near 36.3 km, with poorer spells close to 26.1 km. Sunrise is at 07:25 and sunset at 19:05, giving 11 hours 40 minutes of sunlight today.
Taken together, Dún Laoghaire looks wet enough on September 25, 2026 that flexible outdoor plans work best, with temperatures peaking near 17°C.
Frequently asked questions about weather in Dún Laoghaire
How warm does it get in Dún Laoghaire?
The warmest month in Dún Laoghaire is July, with average high temperatures of 18°C. The average temperature during this period is around 16°C.
How cold does it get in Dún Laoghaire?
The coldest month in Dún Laoghaire is January, with average low temperatures of 3°C. The average temperature during this period is around 5°C.
What is the wettest time of year in Dún Laoghaire?
The wettest month in Dún Laoghaire is September, with an average of 94mm of precipitation.
What is the driest time of year in Dún Laoghaire?
The driest month in Dún Laoghaire is May, with an average of 64mm of precipitation.
