Cork weather in September 2025

Expect daytime maximum temperatures of 61°F in Cork, Ireland in September based on long-term weather averages. There are 4 hours of sunshine per day on average with 17 days with some rainfall and typically 3.8 inches of rainfall in the month.

  • 61°F maximum daytime temperature in September in Cork61
    61°F max day temperature
  • 4 hours of sunshine per day
  • 17 days with some rainfall in September in Cork17
    17 days with some rainfall
  • 50°F minimum night-time temperature in September in Cork50
    50°F 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
  • 3.8 inches monthly rainfall in September in Cork3.8
    3.8 inches of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Cork4
    4 (Moderate) UV index
  • 59°F sea temperature in September in Cork59
    59°F 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)  |  Imperial (°F)

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More about Ireland

How warm is it in Cork in September?

Daytime temperatures usually reach 61°F in Cork in September, falling to 50°F 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 59°F.

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 3.8 inches.

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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