Letterkenny weather in October 2025

Expect daytime maximum temperatures of 54°F in Letterkenny, Ireland in October based on long-term weather averages. There are 2 hours of sunshine per day on average with 23 days with some rainfall and typically 5.2 inches of rainfall in the month.

  • 54°F maximum daytime temperature in October in Letterkenny54
    54°F max day temperature
  • 2 hours of sunshine per day
  • 23 days with some rainfall in October in Letterkenny23
    23 days with some rainfall
  • 45°F minimum night-time temperature in October in Letterkenny45
    45°F 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
  • 5.2 inches monthly rainfall in October in Letterkenny5.2
    5.2 inches 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)  |  Imperial (°F)

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More about Ireland

How warm is it in Letterkenny in October?

Daytime temperatures usually reach 57°F in Letterkenny in October, falling to 46°F at night.

How sunny is it in Letterkenny in October?

There are normally 3 hours of bright sunshine each day in Letterkenny in October - that's 29% of daylight hours.

How warm is the sea around Letterkenny in October?

The average sea temperature around Letterkenny in October is 55°F.

Does it rain in Letterkenny in October?

There are usually 16 days with some rain in Letterkenny in October and the average monthly rainfall is 2.6 inches.

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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