Weather in Dublin in September
September in Dublin is mild enough that walking is the default. This is a city-break month more than a sea-holiday month.
In Ireland, this is how Dublin actually wears September, not how a country centroid would. Compared with July and February, September sits in the middle of Dublin's year.
- Average temp
- 13°C
9–17°C
- Rainfall
- 61 mm
Showers likely
- Sunshine
- 4.4 h
hours per day
- Wind
- 19 km/h
What to expect
Daytime
Mild afternoons in Dublin are the prize in September. You can eat outside on the good days. You still want something for the breeze.
This is walking weather. Shade is useful, not essential the way it is in the hot months. A long outdoor day is a reasonable plan.
Rain
Mixed skies in Dublin in September. Dry days and wet days share the month. Outdoor plans need a backup, not a cancellation policy.
Pack a shell you will actually carry. The monthly table is the place for totals. This is the feel: usable, interrupted.
Evening
Evenings are cooler. A layer helps after sunset.
What to pack
Rain jacket
A layer for cooler evenings
Where to stay in Dublin
Dates are a starting point for September.
Travel guides for Dublin
What to read before you book.
Average weather in Dublin
TemperatureRainfall
Similar weather in September
Other destinations whose September averages sit close to this one.
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FAQs about Dublin
Climate averages for Dublin, 1991–2020.
The best time to visit Dublin is between May and October, the most comfortable stretch of the year on these averages.
July is the hottest month, with an average around 15°C.
November is the wettest month, with about 83 mm of rain.
No. These are 1991–2020 climate normals from Meteostat, not a live forecast. Actual weather in any given week can differ.
