Daytime highs, nighttime lows and the warmest cities across Ireland this September.
Ireland, experiences maximum daytime temperatures in September ranging from 16°C (61°F) in Greencastle to 18°C (64°F) in Drogheda. Nighttime temperatures generally drop to 11°C (52°F) in Drogheda and 12°C (54°F) in Greencastle.
Find the average daytime temperatures in September for the most popular destinations in Ireland 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 Ireland.
Marker color shows the average daytime high temperature in September: blue is cold, red is hot.
Drill down to September weather for any region in Ireland.
Pick a city to see its September weather averages.
Dublin averages a daytime high of 18°C (64°F) in September, which is moderate for Ireland.
After dark, Dublin cools to about 11°C (52°F) on an average September night.
According to our recent database analysis, Drogheda is the warmest city. It experiences an average maximum daytime temperature of approximately 18°C (64°F) and rarely drops below 11°C (52°F) during the night.
In our database, Greencastle is the chilliest city in September in Ireland. Daytime temperatures typically peak at 16°C (61°F), while the nighttime lows hover around 12°C (54°F).
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 Cork this month, so not the best month to swim.
We have much more information about the climate in Ireland.
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.
Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.
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