Dublin weather in September 2021

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  • 17°C maximum daytime temperature in September in Dublin17
    17°C max day temperature
  • 4 hours of sunshine per day
  • 15 days with some rainfall in September in Dublin15
    15 days with some rainfall
  • 10°C minimum night-time temperature in September in Dublin10
    10°C min night temperature
  • 13 hours of daylight per day in September in Dublin13
    13 hours of daylight per day
  • No heat & humidity in September in Dublin0
    No heat & humidity
  • 64 mm monthly rainfall in September in Dublin64
    64 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Dublin4
    4 (Moderate) UV index
  • 14°C sea temperature in September in Dublin14
    14°C sea temperature

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The September weather guide for Dublin, 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 Dublin in September?

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

How sunny is it in Dublin in September?

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

How warm is the sea around Dublin in September?

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

Does it rain in Dublin in September?

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

Dublin sunrise & sunset times for September 2021

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st September 2021 06:35 20:14
Wednesday, 15th September 2021 06:59 19:40
Thursday, 30th September 2021 07:25 19:04
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Metric (°C / mm)  |  Imperial (°F / inches)

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Where is hot in Ireland in September for 2021/2022?

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

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