Ireland weather in September 2021

Get the latest coronavirus (COVID-19) updates for Ireland with current travel advice, statistics and online resources.

Below are average maximum temperatures at popular destinations in Ireland in September. Select a destination to see more weather parameters.

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The September weather guide for Ireland shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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How warm is it in Ireland in September?

Daytime temperatures usually reach 17°C in Dublin, Ireland in September, falling to 10°C at night.

How sunny is it in Ireland in September?

There are normally 4 hours of bright sunshine each day in Dublin, Ireland in September - that's 33% of daylight hours.

How warm is the sea around Ireland in September?

The average sea temperature around Dublin, Ireland in September is 14°C.

Does it rain in Ireland in September?

There are usually 15 days with some rain in Dublin, Ireland in September and the average monthly rainfall is 64mm.

Ireland sunrise & sunset times for September 2021

Browse the sunrise & sunset times for Ireland in September 2021. Select a month to view Ireland sunrise & sunset times for the next twelve months. The Ireland sunrise & sunset times shown below are for Dublin.

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