Clifden weather in September 2025

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

  • 16°C maximum daytime temperature in September in Clifden16
    16°C max day temperature
  • 4 hours of sunshine per day
  • 21 days with some rainfall in September in Clifden21
    21 days with some rainfall
  • 10°C minimum night-time temperature in September in Clifden10
    10°C min night temperature
  • 13 hours of daylight per day in September in Clifden13
    13 hours of daylight per day
  • No heat & humidity in September in Clifden0
    No heat & humidity
  • 116 mm monthly rainfall in September in Clifden116
    116 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Clifden4
    4 (Moderate) UV index
  • 15°C sea temperature in September in Clifden15
    15°C sea temperature

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

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

How sunny is it in Clifden in September?

There are normally 4 hours of bright sunshine each day in Clifden in September - that's 28% of daylight hours.

How warm is the sea around Clifden in September?

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

Does it rain in Clifden in September?

There are usually 21 days with some rain in Clifden in September and the average monthly rainfall is 116mm.

Clifden September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:50 19:29
Monday, 15th September 2025 06:14 18:55
Tuesday, 30th September 2025 06:40 18:19

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