Dublin weather
in September
“Mild and bright — an underrated time to visit.”
Roughly 13 rainy days across the month, on average.
In september, Dublin settles into its quieter, cooler pace. The city keeps a different pulse than in summer or midwinter, and travellers who arrive with the right expectations are rewarded.
Days average around 17°C (63°F), cooling to 11°C after sunset. Expect meaningful rain — some 13 wet days across the month. Pack accordingly and let the weather choose your afternoons. Long days of sunshine reward early starts.
These figures are climatological averages, drawn from a decade of daily records via the Open-Meteo Archive — not a forecast. But they are honest, and they are the sort of thing a good travel guide ought to tell you before you book the flight.
What to pack for Dublin in September
- •A light layer for cool mornings and evenings
- •A compact travel umbrella — one you'll actually carry
- •Comfortable, broken-in walking shoes
- •A small daypack that won't look like a tourist beacon
What to pack for Dublin in September
- →Breathable travel pantsAmazon · shop this
- →Compact travel umbrellaAmazon · shop this
- →Reef-safe sunscreen SPF 50Amazon · shop this
- →Polarized sunglassesAmazon · shop this
- →Universal travel adapterAmazon · shop this
- →Compression packing cubesAmazon · shop this
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Where to stay in Dublin
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Dublin in September — FAQ
Q01Is September a good time to visit Dublin?
Is September a good time to visit Dublin?
Yes — it is a good time to visit, with pleasant, comfortable weather. In September, Dublin averages a high of 17°C (63°F) and a low of 11°C (52°F), with 83mm of rainfall across roughly 13 rainy days.
Q02What is the average temperature in Dublin in September?
What is the average temperature in Dublin in September?
The average high temperature in Dublin during September is 17°C (63°F), with an average low of 11°C (52°F). These figures are averaged from ten years of daily records (2015–2024, Open-Meteo Archive).
Q03How many rainy days does Dublin have in September?
How many rainy days does Dublin have in September?
Dublin averages approximately 13 rainy days in September, with a total monthly rainfall of about 83mm. This is based on daily precipitation records where days with 1mm or more of rain are counted as rainy days.
Q04What should I pack for Dublin in September?
What should I pack for Dublin in September?
For Dublin in September, pack layered clothing for changing temperatures, a compact umbrella or waterproof jacket, comfortable walking shoes. These recommendations are based on the ten-year weather averages for this specific month.
Q05How crowded is Dublin in September?
How crowded is Dublin in September?
Tourist crowds in Dublin during September are typically moderate — shoulder season, a sweet spot between crowds and weather. Consider this when planning accommodation — prices track crowd levels closely.