Is Dublin hot in September?
Days are typically cool at 17.7°C, while nights average 9.4°C.
Ireland · 1991–2020 normal
Dublin in
September.
Typical September weather in Dublin: 17.7°C by day, 9.4°C at night, 68 mm of rain over 12.1 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high17.7°C
Typical low9.4°C
Rain68 mm
Wet days12.1
In the year-round weather comparison, September scores 56 out of 100 (July leads the year at 67). Daylight is calculated as 12 h 36 from latitude 53.33°. Open-water sea temperature is 14.5°C (10 km from the place centre).
September at a glance
What is Dublin like in September?
Plain answers from the measured climate record—not a forecast or a promise about a particular trip.
Does it rain much?
The measured monthly average is 68 mm across about 12 wet days.
How much daylight is there?
There are about 12 h 36 between sunrise and sunset at mid-month, calculated from the place latitude.
Is September a good time to visit?
September ranks 4 of 12 in our weather comparison; July ranks first.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 2964574
- NOAA station
- EI000003969 · DUBLIN PHOENIX PARK
- Station distance
- 5.8 km from the place centre
- Coverage
- Strong coverage · 28 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.
Next step
Choose your month.
Then plan the details.
The weather comparison for Dublin is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
How travel partnerships will work