Letterkenny weather in October 2025

Expect 12°C daytime maximum temperatures in the shade with on average 2 hours of sunshine per day in Letterkenny in October. Check more long-term weather averages for Letterkenny in October before you book your next holiday to Ireland in 2025/2026.

  • 12°C maximum daytime temperature in October in Letterkenny12
    12°C max day temperature
  • 2 hours of sunshine per day
  • 23 days with some rainfall in October in Letterkenny23
    23 days with some rainfall
  • 7°C minimum night-time temperature in October in Letterkenny7
    7°C min night temperature
  • 10 hours of daylight per day in October in Letterkenny10
    10 hours of daylight per day
  • No heat & humidity in October in Letterkenny0
    No heat & humidity
  • 132 mm monthly rainfall in October in Letterkenny132
    132 mm of monthly rainfall
  • UV (maximum) index 2 (Low) in October in Letterkenny2
    2 (Low) UV index

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The October weather guide for Ireland (Letterkenny) 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 Letterkenny in October?

Daytime temperatures usually reach 12°C in Letterkenny in October, falling to 7°C at night.

How sunny is it in Letterkenny in October?

There are normally 2 hours of bright sunshine each day in Letterkenny in October - that's 23% of daylight hours.

Does it rain in Letterkenny in October?

There are usually 23 days with some rain in Letterkenny in October and the average monthly rainfall is 132mm.

Letterkenny October sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st October 2025 06:34 18:06
Thursday, 16th October 2025 07:03 17:29
Friday, 31st October 2025 07:33 16:55

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