Ireland (Dublin)
Ireland · Europe
The best time to visit Ireland (Dublin) is May, June, July, August, September, and October. In summer, daytime highs average 20°C (68°F), with peaks around 23°C (73°F); in winter, nights average 3°C (37°F), dropping to around -3°C (27°F) on the coldest. All climate data are based on historical monthly averages (2005–2025) to help you plan the optimal travel time.
Ireland (Dublin) – What you should know
Dublin has a balanced oceanic climate: daytime highs range from 8°C (46°F) in January to 19°C (66°F) in July, around 23°C (73°F) on the warmest days, and even the coldest nights only drop to about -3°C (27°F). Rain falls evenly through the year, averaging 40 to 75 mm (1.6 to 3.0 in) a month on six to nine rainy days. April is the driest spring month at around 40 mm (1.6 in), while late summer and autumn are slightly wetter, with about 70 mm (2.8 in) in August and October.
For a city break, May to September is the most pleasant time: the days are long, and in June the sun shines just under six hours a day on average. Sights such as Trinity College with the Book of Kells, the Guinness Storehouse and Kilmainham Gaol are indoors or close together, so a rainy afternoon is no problem. An evening in a pub belongs to every season.
Spring and autumn also work well: on St Patrick's Day on 17 March the city is full of parades, though with highs around 10°C (50°F) it is still fresh. Day trips go to Howth, Dalkey or the Wicklow Mountains; the Irish Sea reaches just under 16°C (61°F) in August, which is only for the brave. In December the sun shines under an hour a day on average, but winters are mild and short on snow.
Climate Overview
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ø day, range from coolest to warmest dayØ dayrange | 8° (46°)3– (37–)13 (55) | 9° (48°)3– (37–)13 (55) | 10° (50°)5– (41–)14 (57) | 12° (54°)7– (45–)17 (63) | 15° (59°)10– (50–)20 (68) | 18° (64°)12– (54–)23 (73) | 20° (68°)14– (57–)23 (73) | 19° (66°)14– (57–)22 (72) | 17° (63°)12– (54–)21 (70) | 14° (57°)10– (50–)18 (64) | 11° (52°)4– (39–)15 (59) | 9° (48°)3– (37–)14 (57) |
Ø night, range from coldest to warmest nightØ nightrange | 3° (37°)-3– (27–)9 (48) | 3° (37°)-3– (27–)9 (48) | 3° (37°)-3– (27–)9 (48) | 5° (41°)-2– (28–)9 (48) | 8° (46°)1– (34–)12 (54) | 10° (50°)4– (39–)15 (59) | 12° (54°)6– (43–)16 (61) | 12° (54°)6– (43–)16 (61) | 10° (50°)4– (39–)15 (59) | 8° (46°)1– (34–)13 (55) | 5° (41°)-2– (28–)12 (54) | 4° (39°)-3– (27–)10 (50) |
☀️Sunshine | 2h UV 1 | 3h UV 3 | 4h UV 4 | 5h UV 5 | 6h UV 6 | 6h UV 6 | 5h UV 6 | 5h UV 6 | 4h UV 4 | 3h UV 3 | 2h UV 2 | 1h UV 1 |
🌊Water Temp | 9° (48°) | 8° (46°) | 8° (46°) | 10° (50°) | 12° (54°) | 14° (57°) | 16° (61°) | 16° (61°) | 15° (59°) | 14° (57°) | 11° (52°) | 10° (50°) |
🌧Rain Days | 8d54mm (2.1") | 6d46mm (1.8") | 7d53mm (2.1") | 6d39mm (1.6") | 7d48mm (1.9") | 7d55mm (2.2") | 8d64mm (2.5") | 7d69mm (2.7") | 7d55mm (2.2") | 8d73mm (2.9") | 8d71mm (2.8") | 9d65mm (2.6") |
Best travel timeØ = average · small figures = range: coolest–warmest day / coldest–warmest nightClimate data 2005–2025 · Source: ERA5 + station data
Travel Tips
April offers great weather in Ireland (Dublin) with fewer tourists and lower prices — ideal for those who want to avoid the peak season crowds.
The travel year in Ireland (Dublin)
December – February
Christmas lights on Grafton Street, dark afternoons and daytime highs around 8°C (46°F). Snow is rare and rain comes in short showers. Pubs with live music, museums and open fires are the answer to the weather.
March – May
St Patrick's Day turns the city green around 17 March, after which things calm down. April is comparatively dry with six rainy days, and May brings six hours of sunshine a day. The parks bloom and the coast around Howth is hiked again.
June – September
Long light evenings, daytime highs between 17 and 19°C (63 and 66°F) and terraces that stay full late. This is the main season for Trinity College, the Guinness Storehouse and day trips to Wicklow. A rain shower is part of the package but usually passes quickly.
October – November
Autumn brings softer light, leaves in St Stephen's Green and more rainy days again. The city is calmer, hotel prices drop and Halloween has its roots in Ireland. In November the sun shines only an hour and a half a day on average.
Events & Festivals
March
- St Patrick's Festival· several days up to 17 March
Ireland's national day is celebrated in Dublin over several days. The highlight is the parade at noon on 17 March along O'Connell Street and over O'Connell Bridge, with more than 3,000 participants.
June
- Bloomsday· 16 June
A celebration of James Joyce's "Ulysses", which is set on this day. Readings, music and walks all over the city, many visitors dress in Edwardian clothing.
October
- Dublin Theatre Festival· late September to mid-October (18 days)
International theatre festival with Irish and visiting productions at stages across the city.
Frequently Asked Questions
- When is the best time to visit Ireland (Dublin)?
- The best time to visit Ireland (Dublin) is May, June, July, August, September, and October. These months offer the most favourable combination of sunshine, temperatures, and low rainfall.
- How warm does it get in Ireland (Dublin)?
- In summer, daytime highs in Ireland (Dublin) average 20°C (68°F), with peaks around 23°C (73°F); in winter, nights average 3°C (37°F), dropping to around -3°C (27°F) on the coldest.
- How much rain does Ireland (Dublin) get?
- Ireland (Dublin) has a relatively even rainfall pattern with an average of 7 rain days per month. The driest months are February, April, and May.
- How warm is the water in Ireland (Dublin)?
- Water temperature in Ireland (Dublin) ranges from 8°C (46°F) (February) to 16°C (61°F) (August). That makes the sea cool for swimming all year round.
Best Travel Time by Vacation Type
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City Trip
Pleasantly mild, not too hot
JunJulAug
