Cork weather in September 2025

Expect 16°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Cork in September. Check more long-term weather averages for Cork in September before you book your next holiday to Ireland in 2025/2026.

  • 16°C maximum daytime temperature in September in Cork16
    16°C max day temperature
  • 4 hours of sunshine per day
  • 17 days with some rainfall in September in Cork17
    17 days with some rainfall
  • 10°C minimum night-time temperature in September in Cork10
    10°C min night temperature
  • 13 hours of daylight per day in September in Cork13
    13 hours of daylight per day
  • No heat & humidity in September in Cork0
    No heat & humidity
  • 96 mm monthly rainfall in September in Cork96
    96 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Cork4
    4 (Moderate) UV index
  • 15°C sea temperature in September in Cork15
    15°C sea temperature

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The September weather guide for Ireland (Cork) 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.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about Ireland

How warm is it in Cork in September?

Daytime temperatures usually reach 16°C in Cork in September, falling to 10°C at night.

How sunny is it in Cork in September?

There are normally 4 hours of bright sunshine each day in Cork in September - that's 32% of daylight hours.

How warm is the sea around Cork in September?

The average sea temperature around Cork in September is 15°C.

Does it rain in Cork in September?

There are usually 17 days with some rain in Cork in September and the average monthly rainfall is 96mm.

Cork September sunrise & sunset times

Browse the sunrise and sunset times for Cork in September 2025. Select a month to view Cork sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:46 19:20
Monday, 15th September 2025 06:09 18:48
Tuesday, 30th September 2025 06:33 18:13

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