Best Time to Visit Dublin: Month-by-Month Weather

When is the best time to visit Dublin?

May and June suit most visitors: Met Éireann’s Dublin Airport averages give May the most sunshine, 6.4 hours a day, and June the fewest wet days, 9.8. September is the calmer alternative. Avoid St Patrick’s week, 13 to 17 March 2027, and big rugby weekends unless the event is the reason you are going.

Dublin’s weather is mild and changeable rather than extreme. Met Éireann’s 1991–2020 averages for Dublin Airport put the mean daily high at 8.0°C in January and 19.5°C in July, with 772.5 mm of rain a year falling on 137 days with at least 1 mm. No month is reliably dry, so the differences that matter are daylight, sunshine and how busy the city is.

That makes timing a trade between three things: sunshine, which peaks in May; warmth, which peaks in July and August; and demand, which jumps around the St Patrick’s Festival, Six Nations rugby at the Aviva Stadium and stadium concerts. Late spring and early autumn balance the three best, and winter rewards travellers who came for pubs, music and museums rather than views.

We checked this guide on 16 October 2026 against Met Éireann, festival and venue websites, Heritage Ireland, the Workplace Relations Commission and the UK Foreign Office. Once you have a month, compare bases in where to stay in Dublin and pace the days with the Dublin 3-day itinerary or the Dublin 7-day itinerary.

What is Dublin’s weather like month by month?

Dublin’s averages move gently: daily highs run from 8.0°C in January to 19.5°C in July, and every month has roughly 10 to 13 days with at least 1 mm of rain. Sunshine changes most, from 1.7 hours a day in December to 6.4 in May. October and November are the wettest months by volume.

All figures are Met Éireann’s 1991–2020 averages for Dublin Airport. Rain days count days with at least 1 mm; sunshine is the average number of hours of bright sunshine per day. The last column is our planning note, not part of the official data.

Three patterns stand out. May is the sunniest month and one of the drier ones; June has the fewest wet days; and August, despite its warmth, records more rain, 73.4 mm, than any month from February to July. From October the totals climb to 78.4 mm and then 82.7 mm in November, while the average number of days with gales rises from almost none in summer to 2.3 in January.

Cold is rarely the problem. Met Éireann records 35 days of air frost a year at the airport, most of them from December to February, and 12.5 days with snow or sleet, which usually means a passing shower rather than a city brought to a halt. Pack a waterproof in every season and layers from October to April.

Is spring a good time to visit Dublin?

Yes, especially from late April. Sunshine rises from 3.7 hours a day in March to 6.4 in May, and highs climb from 10.1°C to 14.8°C. March is the exception for planning: Six Nations rugby and the St Patrick’s Festival, 13 to 17 March 2027, bring the year’s biggest crowds.

Met Éireann’s Dublin Airport averages show spring as the steadiest season. March, April and May each average 51 to 57 mm of rain on about 11 days, frost fades from 5.5 days in March to 0.5 in May, and gales become rare after March. It is the best season for combining city days with coastal walks at Howth or a trip into the Wicklow Mountains.

March is two trips in one. The St Patrick’s Festival runs from Saturday 13 to Wednesday 17 March 2027, and the Aviva Stadium hosts Ireland v France on 13 March, the festival’s opening day, after Ireland v England on 5 February. Expect the city centre to be packed around the 17 March parade and book rooms early; outside that week and the match weekends, March is quieter, if still cool.

Bank holiday Mondays shape the rest of spring. The Workplace Relations Commission lists Ireland’s public holidays as Easter Monday and the first Mondays of February, May and June, which in 2027 fall on 29 March, 1 February, 3 May and 7 June. Some sights keep shorter spring hours too: the Phoenix Park Visitor Centre is closed on Mondays and Tuesdays from January to the end of April (Phoenix Park).

What is Dublin like in summer?

Summer is Dublin’s warmest season, with July highs of 19.5°C and long evenings, but it is not the sunniest: June to August average 5 to 6 hours of sunshine a day against 6.4 in May, and August is wetter than any earlier month of the year. Book early for concert and event weekends.

The Met Éireann averages put June highs at 17.7°C, July at 19.5°C and August at 19.1°C, with lows of 9 to 11°C, so a light jacket still earns its place in the evening. June is the driest month by rain days, 9.8, while August collects 73.4 mm, the most of any month from February to July.

Summer’s events are spread out rather than stacked. Bloomsday falls on 16 June each year, and the Bloomsday Festival ran from 11 to 16 June in 2026, though its 2027 dates had not been announced when we checked. The Dublin Horse Show returns to the RDS in Ballsbridge from 4 to 8 August 2027, the week of the August bank holiday on Monday 2 August, and the Aviva Stadium lists a Noah Kahan concert on 17 July 2027.

Summer is also the easiest season for day trips. The Brú na Bóinne visitor centre, the only way into Newgrange and Knowth, opens 9am to 5.45pm from May to September and takes bookings 30 days ahead from April to November, against 7 days in winter (Heritage Ireland). The Glendalough Visitor Centre stays open to 6pm in summer (Heritage Ireland), and the long evenings make a late walk on the Howth cliffs realistic.

Should you visit Dublin in autumn?

September is autumn’s best month, with 16.9°C highs and the arts festivals under way; October and November are Dublin’s wettest months. The October bank holiday weekend brings the Bram Stoker Festival and the Dublin Marathon, 23 to 26 October 2026, and November’s rugby internationals fill the Aviva Stadium.

September is the sweet spot of the season: Met Éireann averages 16.9°C highs, 4.4 hours of sunshine a day and 63.3 mm of rain. October and November turn wetter, with 78.4 mm and 82.7 mm, and darker, with 3.4 and 2.4 hours of sunshine a day, and gales begin to return, averaging 0.8 days in November.

The arts calendar clusters at the start of the season. In 2026 the Dublin Fringe Festival ran from 5 to 20 September, Culture Night took place on Friday 18 September and the Dublin Theatre Festival ran from 24 September to 11 October; check their sites for 2027 dates. At the end of October the Bram Stoker Festival runs from 23 to 26 October 2026, and the Dublin Marathon starts at 8.45am on Sunday 25 October, the day before the October bank holiday.

November belongs to rugby. The Aviva Stadium’s listings show Ireland v Argentina on 6 November, Ireland v Fiji on 14 November and Ireland v South Africa on 21 November 2026, so plan around those match days if you want a quiet weekend, or book early if you want a ticket.

Is winter a good time to visit Dublin?

Yes, if you came for pubs, music and museums rather than views. It is the darkest season, with under two hours of sunshine a day in December and January, but NYF Dublin and TradFest fill the calendar. This winter, check closures: Dublin Castle reopens in January 2027, and many sights shut over Christmas.

Winter is dark rather than freezing. Met Éireann’s averages give December 1.7 hours of sunshine a day and January 1.9, with highs of 8.0 to 8.5°C and around seven nights of air frost a month from December to February. Rain days peak at 13.3 in December, and January averages 2.3 days with gales, the most of any month.

Ireland’s EU Council Presidency affects several big sights this winter. Dublin Castle says its campus is closed to the public until January 2027, Visit Dublin reports that the Chester Beatty is closed from 15 June to the end of December 2026, and Heritage Ireland says Farmleigh House is closed for the rest of 2026, though its grounds stay open. Public-sector industrial action has also closed the National Gallery and the National Museum on Kildare Street on single days in October 2026, so check on the morning you go.

The festive season runs from NYF Dublin, the city’s New Year festival, on 30 December 2026 to 1 January 2027, to TradFest, listed by Tourism Ireland for 20 to 24 January 2027. Plan around the Christmas shutdown: Kilmainham Gaol closes from 24 to 27 December (Kilmainham Gaol), the National Gallery from 24 to 26 December (National Gallery) and the Glendalough Visitor Centre from 23 to 29 December (Heritage Ireland).

Which Dublin events change prices and crowds?

St Patrick’s week and Six Nations weekends are the biggest pressure points, followed by November’s rugby internationals, the October bank holiday weekend with the marathon and Bram Stoker Festival, the Dublin Horse Show in August and New Year. Book those dates early, keep free cancellation and check the stadium calendar before choosing Ballsbridge.

Dates come from each organiser’s or venue’s own site, checked on 16 October 2026: the St Patrick’s Festival, the Aviva Stadium, the Dublin Marathon, the Bram Stoker Festival, NYF Dublin and the Dublin Horse Show, with Tourism Ireland for TradFest. Bank holidays follow the rules published by the Workplace Relations Commission.

The effect column is our reading of where demand concentrates, not a measured price change. Stadium dates matter most if you stay in Ballsbridge, beside the Aviva, and festival weeks matter most in the centre. Croke Park on the Northside adds GAA finals in summer, but their 2027 dates were not on an official calendar when we checked.

Which month suits your kind of Dublin trip?

Walkers and day-trippers should aim for May or June, when sunshine and daylight peak. Rugby fans plan around the Aviva Stadium fixtures, festival-goers around March or the autumn arts season, and anyone watching costs should look at quiet midweek dates from late January to early March, avoiding match and festival weekends.

The table matches common trip types to the months that serve them best, using the climate figures and event dates above. Where two months are listed, the first is our preference. None of these windows is guaranteed dry: even June averages 9.8 days with at least 1 mm of rain at Dublin Airport.

Families should check Irish bank holiday weekends as well as their own school holidays, and anyone planning day trips should favour April to September, when the Glendalough and Brú na Bóinne visitor centres keep their longer hours. Business travellers will find midweek dates outside the big events easiest year-round.

What can disrupt a Dublin trip, season by season?

Three things: Atlantic storms, mostly from autumn to early spring, which Met Éireann flags with yellow, orange and red warnings; closures, from Christmas shutdowns to this winter’s EU Presidency and industrial-action closures; and sold-out event weekends. Crime is a smaller worry: the FCDO mainly warns about pickpockets and bag-snatching.

Met Éireann’s warning system runs from yellow, for localised danger, through orange, for dangerous or disruptive weather, to red, for rare and extremely dangerous conditions, and warnings are generally issued no more than 60 hours ahead. Storms are named when they could cause medium or high impacts, and the 2026/27 naming season runs to 31 August 2027. On an orange or red day, swap Howth, Glendalough or Brú na Bóinne for museums and check your train or coach before setting out.

The UK Foreign Office’s safety advice for Ireland is brief: guard against bag-snatching and pickpocketing, which happen mostly in larger cities, be aware that protests can start at short notice, and remember that drug offences carry severe penalties. It names no Dublin district to avoid.

Closures are the less obvious risk. Beyond Christmas, single-day closures during public-sector industrial action hit the National Gallery and the National Museum in October 2026, and the EU Presidency has shut Dublin Castle and the Chester Beatty until the end of 2026. Check a sight’s own site the evening before, not just when you book.

So when should you visit Dublin?

Go in May for the most sunshine, June for the fewest wet days, or September for mild weather and the arts festivals. Choose March only for St Patrick’s, February, March or November only for rugby, and winter for pubs, music and museums. Whatever the month, pack a waterproof: no month averages fewer than 9.8 wet days.

If your dates are flexible, the strongest single choice is mid-May to mid-June on weekdays, avoiding the June bank holiday weekend. You get the year’s best light for Howth and Glendalough, normal opening hours, and none of the festival or match-day pressure of March and November.

Next, choose a base with where to stay in Dublin and plan the days with the Dublin 3-day itinerary or the Dublin 7-day itinerary. For arrival, see Dublin Airport to the city by bus or transfer; for onward travel, Dublin to Belfast by train or plane. The Dublin destination guide and Dublin hotels collect the rest.