Daytime highs, nighttime lows and the warmest cities in Dublin County, Ireland this September.
Dublin County, Ireland, a region in Ireland, typically experiences mild weather in September, with maximum daytime temperatures around 18°C (64°F) and nighttime temperatures around 11°C (52°F) in Dublin.
Find the average daytime temperatures in September for the most popular destinations in Dublin County on the map below. Click on a destination dot for more detailed information.
Check the conditions for any month of the year.
Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Dublin County.
Marker color shows the average daytime high temperature in September: blue is cold, red is hot.
Expect daytime temperatures around 18°C (64°F) in Dublin. That makes September a moderate month for Dublin County, Ireland.
After dark, Dublin cools to about 11°C (52°F) on an average September night.
Most cities enjoy a balanced amount of sunshine, with around 128 hours of sunlight anticipated in Dublin. This ensures the days are neither too dim nor excessively sunny.
The water temperature averages approximately 15°C (59°F) in Dublin this month, generally too cold for comfortable swimming.
We have much more information about the climate in Dublin County.
Weather and climate has detailed information for every country in the world. Are you going to Ireland? Get detailed historical weather averages for many cities in Ireland.
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