Letterkenny weather in May 2026

Expect daytime maximum temperatures of 13°C in Letterkenny, Ireland in May based on long-term weather averages. There are 6 hours of sunshine per day on average with 19 days with some rainfall and typically 82 mm of rainfall in the month.

  • 13°C maximum daytime temperature in May in Letterkenny13
    13°C max day temperature
  • 6 hours of sunshine per day
  • 19 days with some rainfall in May in Letterkenny19
    19 days with some rainfall
  • 5°C minimum night-time temperature in May in Letterkenny5
    5°C min night temperature
  • 16 hours of daylight per day in May in Letterkenny16
    16 hours of daylight per day
  • No heat & humidity in May in Letterkenny0
    No heat & humidity
  • 82 mm monthly rainfall in May in Letterkenny82
    82 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in May in Letterkenny5
    5 (Moderate) UV index

More about Letterkenny

Letterkenny by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Ireland

Spabreaks.com: Top deals on spa breaks

  • Browse top deals on spa breaks in UK & Ireland
  • Search by postcode, venue, town or county
  • Filter deals by destination, price, package & facilities
Go to Spabreaks.com deal >>

View all Spabreaks.com offers

The May 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)

Back to top

More about Ireland

How warm is it in Letterkenny in May?

Daytime temperatures usually reach 15°C in Letterkenny in May, falling to 7°C at night.

How sunny is it in Letterkenny in May?

There are normally 6 hours of bright sunshine each day in Letterkenny in May - that's 38% of daylight hours.

Is the sea cold around Letterkenny in May?

The average sea temperature around Letterkenny in May is 10°C.

Does it rain in Letterkenny in May?

There are usually 16 days with some rain in Letterkenny in May and the average monthly rainfall is 55mm.

Letterkenny May sunrise & sunset times

Browse the sunrise and sunset times for Letterkenny in May 2026. Select a month to view Letterkenny sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st May 2026 04:51 20:06
Saturday, 16th May 2026 04:22 20:34
Sunday, 31st May 2026 04:01 20:57

Related posts

Popular travel offers

Explore holiday destinations

More holidays

Save with latest deals & discounts

More deals

Airport parking

More parking

Airport lounges

More lounges

Top ^