Fermoy weather in September 2025

Expect daytime maximum temperatures of 17°C in Fermoy, Ireland in September based on long-term weather averages. There are 4 hours of sunshine per day on average with 18 days with some rainfall and typically 100 mm of rainfall in the month.

  • 17°C maximum daytime temperature in September in Fermoy17
    17°C max day temperature
  • 4 hours of sunshine per day
  • 18 days with some rainfall in September in Fermoy18
    18 days with some rainfall
  • 10°C minimum night-time temperature in September in Fermoy10
    10°C min night temperature
  • 13 hours of daylight per day in September in Fermoy13
    13 hours of daylight per day
  • No heat & humidity in September in Fermoy0
    No heat & humidity
  • 100 mm monthly rainfall in September in Fermoy100
    100 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Fermoy4
    4 (Moderate) UV index

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The September weather guide for Ireland (Fermoy) 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 Fermoy in September?

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

How sunny is it in Fermoy in September?

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

Does it rain in Fermoy in September?

There are usually 18 days with some rain in Fermoy in September and the average monthly rainfall is 100mm.

Fermoy September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:45 19:20
Monday, 15th September 2025 06:08 18:48
Tuesday, 30th September 2025 06:33 18:12

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