Glengariff weather in September 2025

Expect daytime maximum temperatures of 16°C in Glengariff in September based on long-term weather averages. There are 4 hours of sunshine per day on average with 19 days with some rainfall and typically 133 mm of rainfall in the month.

  • 16°C maximum daytime temperature in September in Glengariff16
    16°C max day temperature
  • 4 hours of sunshine per day
  • 19 days with some rainfall in September in Glengariff19
    19 days with some rainfall
  • 10°C minimum night-time temperature in September in Glengariff10
    10°C min night temperature
  • 13 hours of daylight per day in September in Glengariff13
    13 hours of daylight per day
  • No heat & humidity in September in Glengariff0
    No heat & humidity
  • 133 mm monthly rainfall in September in Glengariff133
    133 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Glengariff4
    4 (Moderate) UV index
  • 15°C sea temperature in September in Glengariff15
    15°C sea temperature

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

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

How sunny is it in Glengariff in September?

There are normally 4 hours of bright sunshine each day in Glengariff in September - that's 30% of daylight hours.

How warm is the sea around Glengariff in September?

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

Does it rain in Glengariff in September?

There are usually 19 days with some rain in Glengariff in September and the average monthly rainfall is 133mm.

Glengariff September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:51 19:24
Monday, 15th September 2025 06:13 18:52
Tuesday, 30th September 2025 06:38 18:18

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