Climate and monthly weather forecastDún Laoghaire, Ireland
Dún Laoghaire, Ireland - Climate and weather forecast by month. Detailed climate information with charts - average monthly weather with temperature, pressure, humidity, precipitation, wind, daylight, sunshine, visibility, and UV index data. The month with the most rainfall in Dún Laoghaire, Ireland, is November, when the rain falls for 17.6 days and typically aggregates up to 71mm (2.8") of precipitation. With an average relative humidity of 82%, March is the least humid month in Dún Laoghaire, Ireland.
Climate and monthly weather forecast
Weather in January
January, the same as December, in Dún Laoghaire, Ireland, is a frosty winter month, with an average temperature fluctuating between 7.8°C (46°F) and 4.5°C (40.1°F). January and February are the coldest months, with an average high-temperature of 7.8°C (46°F). Weather in January »Weather in February
February, the last month of the winter in Dún Laoghaire, is also a frosty month, with an average temperature varying between 7.8°C (46°F) and 4.4°C (39.9°F). Dún Laoghaire witnesses its lowest temperatures in January and February, reaching an average of 7.8°C (46°F). Weather in February »Weather in March
The first month of the spring, March, is also a frosty month in Dún Laoghaire, Ireland, with an average temperature ranging between min 4.6°C (40.3°F) and max 8.8°C (47.8°F). The onset of March brings an average high-temperature of a still frosty 8.8°C (47.8°F), nearly matching the February temperature. Weather in March »Weather in April
April in Dún Laoghaire, Ireland, is a cool spring month, with an average temperature varying between 10.3°C (50.5°F) and 6.3°C (43.3°F). As Dún Laoghaire steps into April, the average high-temperature holds at a fresh 10.3°C (50.5°F), hinting at a minor fluctuation from the prior month. Weather in April »Weather in May
May, the last month of the spring in Dún Laoghaire, is also a fresh month, with an average temperature varying between 8.3°C (46.9°F) and 12.6°C (54.7°F). The transition into May is marked with an average high-temperature of a still fresh 12.6°C (54.7°F), showing an insignificant shift from April's 10.3°C (50.5°F). Weather in May »Weather in June
The first month of the summer, June, is a mild month in Dún Laoghaire, Ireland, with an average temperature varying between 15.1°C (59.2°F) and 10.8°C (51.4°F). The shift into June finds Dún Laoghaire at an average high-temperature of a mild 15.1°C (59.2°F), closely comparable to May's conditions. Weather in June »Weather in July
July in Dún Laoghaire, Ireland, is an enjoyable summer month, with an average temperature ranging between min 12.3°C (54.1°F) and max 16.9°C (62.4°F). The warmest months are July and August, with an average high-temperature of 16.9°C (62.4°F). Weather in July »Weather in August
The last month of the summer, August, is another comfortable month in Dún Laoghaire, Ireland, with an average temperature varying between 12.7°C (54.9°F) and 16.9°C (62.4°F). The months of July and August see the peak of Dún Laoghaire's temperatures, averaging a high of 16.9°C (62.4°F). Weather in August »Weather in September
September, the first month of the autumn in Dún Laoghaire, is also a moderate month, with an average temperature varying between 15.2°C (59.4°F) and 11.3°C (52.3°F). The average high-temperature is a still refreshing 15.2°C (59.4°F) in September, hardly different from the 16.9°C (62.4°F) recorded in August. Weather in September »Weather in October
October, like September, is a moderate autumn month in Dún Laoghaire, Ireland, with an average temperature varying between 13.4°C (56.1°F) and 9.9°C (49.8°F). The advent of October sees the average high-temperature at a still moderate 13.4°C (56.1°F), subtly shifted from September's 15.2°C (59.4°F). Weather in October »Weather in November
November, the last month of the autumn in Dún Laoghaire, is also a fresh month, with temperature in the range of an average high of 10.1°C (50.2°F) and an average low of 7.1°C (44.8°F). The onset of November brings a small shift in high-temperatures, falling from a moderate 13.4°C (56.1°F) in October to a cool 10.1°C (50.2°F). Weather in November »Weather in December
December, the first month of the winter in Dún Laoghaire, is also a frosty month, with an average temperature fluctuating between 5.4°C (41.7°F) and 8.5°C (47.3°F). December brings an average high-temperature of a frosty 8.5°C (47.3°F), nearly identical to the preceding month. Weather in December »Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature
Dún Laoghaire, Ireland
The warmest months (with the highest average high temperature) are July and August (16.9°C).
The months with the lowest average high temperature are January and February (7.8°C).
The month with the highest average low temperature is August (12.7°C).
The coldest month (with the lowest average low temperature) is February (4.4°C).
Average pressure
Dún Laoghaire, Ireland
- Average pressure in January:
1011.6mbar - Average pressure in February:
1011.2mbar - Average pressure in March:
1014.2mbar - Average pressure in April:
1014.8mbar - Average pressure in May:
1016mbar - Average pressure in June:
1015.3mbar
- Average pressure in July:
1014mbar - Average pressure in August:
1012.9mbar - Average pressure in September:
1015.4mbar - Average pressure in October:
1012.8mbar - Average pressure in November:
1008.3mbar - Average pressure in December:
1011.1mbar
The month with the highest atmospheric pressure is May (1016mbar).
The month with the lowest atmospheric pressure is November (1008.3mbar).
Average wind speed
Dún Laoghaire, Ireland
- Average wind speed in January:
25.8km/h - Average wind speed in February:
25.1km/h - Average wind speed in March:
21.7km/h - Average wind speed in April:
18.6km/h - Average wind speed in May:
18.1km/h - Average wind speed in June:
16km/h
- Average wind speed in July:
15.9km/h - Average wind speed in August:
17.7km/h - Average wind speed in September:
19.1km/h - Average wind speed in October:
21.1km/h - Average wind speed in November:
24.6km/h - Average wind speed in December:
25.9km/h
The windiest month (with the highest average wind speed) is December (25.9km/h).
The calmest month (with the lowest average wind speed) is July (15.9km/h).
Average humidity
Dún Laoghaire, Ireland
The month with the highest relative humidity is July (86%).
The month with the lowest relative humidity is March (82%).
Average rainfall
Dún Laoghaire, Ireland
The wettest month (with the highest rainfall) is November (71mm).
The driest month (with the least rainfall) is May (27mm).
Average rainfall days
Dún Laoghaire, Ireland
- Average rainfall days in January:
16.6 days - Average rainfall days in February:
15.8 days - Average rainfall days in March:
14.9 days - Average rainfall days in April:
15.5 days - Average rainfall days in May:
16.1 days - Average rainfall days in June:
16.6 days
- Average rainfall days in July:
20.4 days - Average rainfall days in August:
19.3 days - Average rainfall days in September:
14.9 days - Average rainfall days in October:
15.8 days - Average rainfall days in November:
17.6 days - Average rainfall days in December:
17 days
The month with the highest number of rainy days is July (20.4 days).
The months with the least rainy days are March and September (14.9 days).
Average snowfall
Dún Laoghaire, Ireland
The month with the highest snowfall is December (9mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days
Dún Laoghaire, Ireland
- Average snowfall days in January:
1.3 days - Average snowfall days in February:
1.3 days - Average snowfall days in March:
0.5 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.4 days - Average snowfall days in December:
1.1 days
The months with the highest number of snowfall days are January and February (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature
Dún Laoghaire, Ireland
The best month for swimming (with the highest average sea temperature) is August (14.9°C).
The coldest month (with the lowest average sea temperature) is March (8.4°C).
Average daylight / Average sunshine
Dún Laoghaire, Ireland
- Average daylight in January:
8h and 12min - Average daylight in February:
9h and 54min - Average daylight in March:
11h and 54min - Average daylight in April:
14h and 0min - Average daylight in May:
15h and 54min - Average daylight in June:
16h and 54min
- Average daylight in July:
16h and 24min - Average daylight in August:
14h and 42min - Average daylight in September:
12h and 42min - Average daylight in October:
10h and 36min - Average daylight in November:
8h and 42min - Average daylight in December:
7h and 36min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in January:
4h and 24min - Average sunshine in February:
4h and 24min - Average sunshine in March:
5h and 48min - Average sunshine in April:
7h and 42min - Average sunshine in May:
8h and 0min - Average sunshine in June:
7h and 48min
- Average sunshine in July:
7h and 30min - Average sunshine in August:
7h and 42min - Average sunshine in September:
7h and 18min - Average sunshine in October:
4h and 30min - Average sunshine in November:
4h and 18min - Average sunshine in December:
4h and 36min
The month with the most sunshine is May (Average sunshine: 8h and 0min).
The month with the least sunshine is November (Average sunshine: 4h and 18min).
Average sunshine days
Dún Laoghaire, Ireland
- Average sunshine days in January:
10.9 days - Average sunshine days in February:
8.4 days - Average sunshine days in March:
11.5 days - Average sunshine days in April:
11.7 days - Average sunshine days in May:
11 days - Average sunshine days in June:
10.8 days
- Average sunshine days in July:
7.2 days - Average sunshine days in August:
7.6 days - Average sunshine days in September:
11 days - Average sunshine days in October:
9.5 days - Average sunshine days in November:
7.3 days - Average sunshine days in December:
10.2 days
The month with the most sunshine days is April (11.7 days).
The month with the least sunshine days is July (7.2 days).
Average UV index
Dún Laoghaire, Ireland
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Dún Laoghaire, Ireland
The months with the most cloud cover are February and November (Cloud cover 56).
The month with the least cloud cover is September (Cloud cover 48).
Average visibility
Dún Laoghaire, Ireland
The months with the highest visibility are January, March, October and November (10km).
The months with the lowest visibility are February, April, May, June, July, August, September and December (9km).
