May · Ireland
Best time to visit Killarney in May Weather, crowds & prices
Weather in Killarney in May
Average temperature 12°C, 83 mm of rain, about 21 days with 6+ hours of sunshine and 85% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
May score
8.4/10
Ranked #1 of 12 months
- Avg temp
- 12°C
- Rainfall
- 83 mm
- Humidity
- 85%
- Days with 6h+ sun
- 21
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$$ · Peak Season Rates ($$$)
May in Killarney scores 8.4/10 for nature and wildlife travel - the single best month of the year. Expect around 12°C, 83 mm of rain, and roughly 21 days with 6+ hours of sunshine this month.
Scenic hub on the Ring of Kerry with mountain lakes, Muckross House, and national park.
May in Killarney — the year's strongest window
Expect 12°C (53°F) in May. A good month for city streets, viewpoints and long meals; leave swimming for another season.
Budget for roughly 83 mm of rain this month — a flexible day or two helps — with about 21 days with 6+ hours of sunshine and 15.4 hours of daylight to work around it.
On our climate-comfort scale this is the top-ranked month of the year for Killarney at 8.4/10 — the reference point every other month on this page is measured against.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a packable rain layer, footwear you can get muddy.
Budget for peak pricing, and crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Frequently asked
- What is the weather like in Killarney in May?
- In May, Killarney averages 12°C, 83 mm of rain, and about 21 days with 6+ hours of sunshine. Its climate-comfort score is 8.4/10.
- Is May a good time to visit Killarney?
- May earns a 8.4/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Killarney in May?
- Expect about 83 mm of rain in May. Average humidity is 85% and there are about 21 days with 6+ hours of sunshine.
Curated in Killarney
Tickets & experiences
Things to do in Killarney
Killarney, Ireland. Live activities and tours from GetYourGuide, matched to this destination.