Climate Insights for Dún Laoghaire

The climate in Dún Laoghaire is temperate. The average annual temperature is 10°C and approximately 930 mm of precipitation falls per year. Dún Laoghaire receives a notable amount of rainfall throughout the year, including during its driest month. Dún Laoghaire is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, February, March, when temperatures can drop to 3°C. Light snow can occur between January and December.The climate in Dún Laoghaire is temperate. The average annual temperature is 50°F and approximately 36.6 in of precipitation falls per year. Dún Laoghaire receives a notable amount of rainfall throughout the year, including during its driest month. Dún Laoghaire is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, February, March, when temperatures can drop to 38°F. Light snow can occur between January and December.

Dún Laoghaire sees moderate temperature variation throughout the year, ranging from 3°C to 18°C. July is the warmest month, though highs remain moderate at 18°C with a mean of 16°C. January is the coolest month, with minimum temperatures around 3°C and an average of 5°C. Daily temperature variation is modest, with an average difference of 5°C between highs and lows. The sharpest temperature change occurs between April and May, with a 3°C shift in average temperatures.Dún Laoghaire sees moderate temperature variation throughout the year, ranging from 38°F to 65°F. July is the warmest month, though highs remain moderate at 65°F with a mean of 60°F. January is the coolest month, with minimum temperatures around 38°F and an average of 42°F. Daily temperature variation is modest, with an average difference of 9°F between highs and lows. The sharpest temperature change occurs between April and May, with a 6°F shift in average temperatures.

Dún Laoghaire is a moderately rainy area, receiving approximately 930 mm of precipitation annually, which averages out to around 78 mm per month. The wettest month is September, averaging 94 mm of rainfall. October and July also tend to see above-average precipitation. The driest month is May, with just 64 mm. That's 30 mm less than September, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Light snowfall can occur between January and December, totalling around 18cm annually. March is the snowiest month with approximately 10cm.Dún Laoghaire is a moderately rainy area, receiving approximately 36.6 in of precipitation annually, which averages out to around 3.1 in per month. The wettest month is September, averaging 3.7 in of rainfall. October and July also tend to see above-average precipitation. The driest month is May, with just 2.5 in. That's 1.2 in less than September, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Light snowfall can occur between January and December, totalling around 7in annually. March is the snowiest month with approximately 4in.

Dún Laoghaire is mildly breezy, with an average annual wind speed of 16km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 20km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in May, with average winds dropping to 13km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 7km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 19km/h in winter, 15km/h in spring, 14km/h in summer, 17km/h in autumn.Dún Laoghaire is moderately windy, with an average annual wind speed of 10mph. For context, sustained winds below 7mph are generally light, while anything above 16mph is considered strong. The windiest month is February, averaging 13mph, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in May, with average winds dropping to 8mph, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 5mph gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 12mph in winter, 9mph in spring, 9mph in summer, 10mph in autumn.

The best time to visit Dún Laoghaire is during July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 15°C with modest rainfall averaging 81 mm per month. By contrast, January can be quite cold with temperatures dropping to 3°C. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.The best time to visit Dún Laoghaire is during July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 60°F with modest rainfall averaging 3.2 in per month. By contrast, January can be quite cold with temperatures dropping to 38°F. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Dún Laoghaire based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.The table below shows monthly climate averages for Dún Laoghaire based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Fahrenheit (°F). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in inches (in) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in miles per hour (mph). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.