Ireland weather in September 2025

Expect 17°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Ireland in September. Check more long-term weather averages for Ireland in September before you book your next holiday to Ireland in 2025/2026.

• 17
  17°C max day temperature
• 4
  4 hours of sunshine per day
• 15
  15 days with some rainfall
• 10
  10°C min night temperature
• 13
  13 hours of daylight per day
• 0
  No heat & humidity
• 64
  64 mm of monthly rainfall
• 4
  4 (Moderate) UV index
• 14
  14°C sea temperature

More about Ireland

• 
  Overview
• 
  Best time to visit
• 
  Weather by month
• 
  5-day weather forecast
• 
  Destinations
• 
  Travel advice
• 
  Deals & discounts

Ireland by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Ireland

• Titan Travel^*
• Love Holidays^*
• Saga Holidays^*
• Travel Republic^*

LivingSocial: Latest offers on holidays to Ireland

Sale

• Explore city breaks & country retreats in Ireland
• Destinations include Dublin, Cork, Belfast, Donegal & Kerry
• Filter deals by destination & price. Browse by best discount

Go to LivingSocial deal >>

View all LivingSocial offers

The September weather guide for Ireland (Dublin) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Top Ireland destinations

Below are average maximum temperatures at popular countries, regions and places in Ireland in September. Select a holiday destination to see more weather parameters.

• 17
  Dublin
• 17
  Galway
• 17
  Limerick
• 16
  Cork

All Ireland destinations

• Achill Island
• Adare
• Ardara
• Arklow
• Athlone
• Ballina
• Ballinasloe
• Ballybofey
• Ballyliffin
• Banagher
• Bangor Erris
• Bantry
• Belmullet
• Boyle
• Buncrana
• Bundoran
• Cahir
• Carlow
• Carrick-On-Shannon
• Cashel
• Castlebar
• Castletownbere
• Catherdaniel
• Cavan
• Clifden
• Clonakilty
• Clonmel
• Cobh
• Cong
• Cork
• Dingle
• Donegal
• Doolin
• Downings
• Drogheda
• Dublin
• Dundalk
• Dungarvan
• Dunmore East
• Ennis
• Enniscorthy
• Enniskerry
• Fermoy
• Galway
• Glenbeigh
• Glendalough
• Glengariff
• Gougane Barra
• Gweedore
• Howth
• Inishbofin Island
• Kells
• Kenmare
• Kilkee
• Kilkenny
• Killaloe
• Killarney
• Killybegs
• Kilronan, Aran Islands
• Kinnitty
• Kinsale
• Lahinch
• Letterkenny
• Limerick
• Longford
• Mallow
• Mullingar
• Naas
• Navan
• Oughterard
• Portlaoise
• Redcastle
• Roscommon
• Roscrea
• Rosslare
• Schull
• Skibbereen
• Sligo
• Sneem
• Tralee
• Trim
• Tullamore
• Valentia Island
• Waterford
• Westport
• Wexford
• Wicklow

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

More about Ireland

Ireland September sunrise & sunset times

Browse the sunrise and sunset times for Ireland in September 2025. Select a month to view Ireland sunrise and sunset times for the next 12 months. The Ireland sunrise and sunset times shown below are for Dublin.

JanFebMarAprMayJunJulAugSepOctNovDec

Related posts

Popular travel offers

Explore holidays in the sun for less

• Beach holidays
• Family holidays
• City breaks
• Summer holidays
• Winter sun holidays
• Holiday offers
• Top travel brands
• Airlines & flights
• Discount hotels
• Airport parking deals
• TUI
• Jet2holidays
• easyJet holidays
• Love Holidays
• Boxing Day sales

More holidays

Airport parking

• Manchester Airport
• Stansted Airport
• Bristol Airport
• Luton Airport
• Birmingham Airport
• Edinburgh Airport
• Gatwick Airport
• Glasgow Airport
• Newcastle Airport

More parking

Airport lounges

• Manchester Airport
• Birmingham Airport
• Bristol Airport
• Edinburgh Airport
• Glasgow Airport
• Heathrow Airport
• Newcastle Airport
• Stansted Airport
• Gatwick Airport

More lounges

Top ^