Temperature in Dublin County in September

Dublin County is a region in Ireland. September is generally a mild month with maximum daytime temperatures around 18°C and nighttime temperatures around 11°C in Dublin.

What is the temperature of the different cities in Dublin County in September?

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.

Weather conditions Weather

Temperatures

Precipitation

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Legend

very warm

warm

pleasant

moderate

cold

very cold

Very warm means maximum temperatures above 30°C. Warm: 22°C to 30°C. Pleasant: 18°C to 22°C Moderate: 12°C to 18°C. Cold: 2°C to 12°C. Very cold: lower than 2°C

Select a Month of Interest

Check the weather conditions for any month in Dublin County.

For a detailed overview of the weather over the year and the best time to visit Ireland, check out our Dublin County's climate page.

How much sun does Dublin County get in September?

Dublin enjoys a balanced 128 hours of sunlight. This makes it neither too overcast nor too sunny.

What is the water's temperature in September?

The water temperature averages approximately 15°C in Dublin this month, so not the best month to swim.

Interested in more climate information?

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.