Glendalough weather in September 2025

Expect 15°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Glendalough in September. Check more long-term weather averages for Glendalough in September before you book your next holiday to Ireland in 2025/2026.

  • 15°C maximum daytime temperature in September in Glendalough15
    15°C max day temperature
  • 4 hours of sunshine per day
  • 16 days with some rainfall in September in Glendalough16
    16 days with some rainfall
  • 8°C minimum night-time temperature in September in Glendalough8
    8°C min night temperature
  • 13 hours of daylight per day in September in Glendalough13
    13 hours of daylight per day
  • No heat & humidity in September in Glendalough0
    No heat & humidity
  • 125 mm monthly rainfall in September in Glendalough125
    125 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Glendalough4
    4 (Moderate) UV index

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

Daytime temperatures usually reach 15°C in Glendalough in September, falling to 8°C at night.

How sunny is it in Glendalough in September?

There are normally 4 hours of bright sunshine each day in Glendalough in September - that's 33% of daylight hours.

Does it rain in Glendalough in September?

There are usually 16 days with some rain in Glendalough in September and the average monthly rainfall is 125mm.

Glendalough September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:36 19:14
Monday, 15th September 2025 05:59 18:40
Tuesday, 30th September 2025 06:25 18:04

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