Ireland
Dublin in September
🍂 AutumnCool and some showers.
🎒 Pack: light layers
Why September scores 9.5What goes into the score
How it works- Weather comfort9.1
- ✓Cool (17°C highs / 11°C lows)
- ✓Comfortable humidity (dew point 11.6°C)
- ✓Mostly dry (~61 mm rain)
- Air quality10.0
- ✓Good (within WHO guideline) (PM2.5 ~4 µg/m³)
- Seasonal hazards10.0
- ·No notable seasonal hazards
- Safety baseline9.0
- ·Normal precautions
| Sep | Jul | |
|---|---|---|
| Score | 9.5 Excellent | 9.7 Excellent |
| Season | 🍂 Autumn | ☀️ Summer |
| High / low | 17° / 11° | 20° / 14° |
| Rain | 61 mm | 58 mm |
| Humidity | dew pt 12° | dew pt 13° |
| PM2.5 | 4 µg/m³ | 5 µg/m³ |
Typical-month data: NASA POWER (MERRA-2 reanalysis) 2015–2024 (modelled, not a forecast). Temperatures: Dublin weather-station normals. Rainfall: Merrion Square, Dublin weather-station normals (national met service).
Holidays & crowdsSeptember 2027
No long holidaysNo long public-holiday weekends this month. School holidays aren't counted, so check those if you want to avoid family crowds.
No national public holidays in Ireland this month.
National holidays only; regional holidays and school breaks aren't included. Source: holidays (open-source public-holiday calendar).
Explore DublinEvents, sights, food & souvenirs
Check event dates locallyIreland's capital on the River Liffey, known for its literary history, Georgian architecture, pubs and live music.
Dublin Theatre FestivalDate variesUsually late September to October
A long-running international theatre festival.
Why go: Book popular shows early.
Where: Theatres across the city
Coming up later
Dublin MarathonDate variesUsually late October
A large city marathon.
Why go: Expect road closures.
Where: Citywide
St Patrick's DayEvery year17 March every year, with a festival over several days
Ireland's national day, with a large parade and events.
Why go: Hotels are expensive and the centre is crowded.
Where: City centre
BloomsdayEvery year16 June every year
Fans of James Joyce's Ulysses dress up and retrace the novel's events.
Why go: Readings and walks happen around the city.
Where: Around the city
Trinity College and the Book of Kells
Ireland's oldest university, displaying a 9th-century illuminated manuscript and the Long Room library.
💡 Book ahead, especially in summer.
Guinness Storehouse
A visitor centre at St James's Gate brewery with a rooftop bar.
Kilmainham Gaol
A former prison central to Ireland's independence struggle.
💡 Visits are by guided tour and sell out.
St Patrick's Cathedral
Ireland's largest cathedral, where Jonathan Swift was dean.
Phoenix Park
A huge park with deer herds and the president's residence.
Howth
A fishing village with cliff walks, a short train ride away.
Irish stew
Lamb or mutton stewed with potatoes and onions.
Dublin coddle
A stew of sausages, bacon and potatoes, a Dublin speciality.
Full Irish breakfast
Eggs, sausages, rashers, black and white pudding.
Guinness
Stout brewed in Dublin since 1759.
💡 Pubs
Soda bread
Bread raised with baking soda and buttermilk.
Irish whiskey
Whiskey from Irish distilleries, including some in Dublin.
💡 Specialist shops and distilleries
Aran knitwear
Cable-knit wool sweaters.
💡 Knitwear shops
Irish linen
Tablecloths and textiles.
💡 Department stores and craft shops