Kilkenny weather in May

May in Kilkenny: cool, a little rain, with clean air — an excellent time to visit.

Updated September 2026 · climate normals from ERA5 reanalysis

Kilkenny🇮🇪 Ireland · British Isles · City83
  1. 56Jan
  2. 60Feb
  3. 66Mar
  4. 75Apr
  5. 83May
  6. 87Jun
  7. 89Jul
  8. 86Aug
  9. 78Sep
  10. 69Oct
  11. 61Nov
  12. 53Dec

#4 of 12 months in Kilkenny · #589 of 1413 destinations to visit in May · comfort 83/100 (tier A)

Days
16°C
Nights
8°C
Wet days
10
Sun
10.3 h
Humidity
77%
Daylight
16 h
Kilkenny, Ireland
Photo: Jay's Photography · Pexels

Traveller notes on Kilkenny in May

Notes from nearby Dublin (101 km away)

Kilkenny doesn't have its own notes for May yet — these are about Dublin, close enough to share the season.

Regulars call this a genuinely lovely month, with long, bright days and temperatures that rarely turn genuinely cold, calling it usually one of the more consistent months weather-wise here - though the standard caveat holds that Irish weather can never be fully trusted. Our row backs the mild read, 16.9C over 8.3C nights feeling 6C, with 45.7mm of rain across 9.5 days. Regulars describe a single day capable of running cool, rainy, sunny and warm in turn, so layers plus a waterproof jacket or umbrella remain the standard advice even in this comparatively reliable month. The sea sits at a cool 13.8C. The record: humidity 78 percent, 11.1 hours of sun, an 18.4 kph wind and AQI 39.
OneOfTheMoreConsistentMonthsHere · May · 1 month ago · about Dublin · Read more on tripadvisor.co.nz ↗

Other months in Kilkenny

Forum posters describe January in Ireland as bringing a better-than-average chance of snow and real ice risk, with main and most secondary roads gritted but minor roads still requiring caution. Posters are direct that the biggest practical issue is how short the days run, with some days barely seeming to get properly light at all, and typical temperatures sitting in the 40sF (around 4-9C) alongside wet, drizzly conditions. Posters specifically recommend Kilkenny as a well-suited January destination since it's easily reached from Dublin and every attraction can be covered on foot, making it a practical, compact city pick for winter's short daylight hours. Posters generally recommend leaning on Kilkenny's walkable city center, pubs and indoor sites as the main plan for a January visit rather than fighting the weather.
Tripadvisor community · January · 1 month ago · Read more on Tripadvisor ↗
Forum regulars call July Ireland's driest month on paper, but still expect drizzle - one visitor described hail, strong winds, thunder and sun all within 8 hours, and the recurring line is that a forecast is only reliable about 48 hours out at best. The standard packing list: a light jacket and sweater for cool nights, proper rain gear with a hooded waterproof top rather than an umbrella (which regulars call impractical in Irish towns and cities). July also draws the year's biggest crowds to nearby tourist hubs like Killarney, with several posters suggesting September instead for a similar climate with noticeably fewer visitors.
Tripadvisor community · July · 1 month ago · Read more on Tripadvisor ↗

Add your own note from Kilkenny's card on the map.

Kilkenny climate normals — May

Daytime high16°C / 61°F🙂 cool
Nighttime low8°C / 47°F
Feels like (high)14°C / 57°F
Rainfall56 mm / 2.2 in🌦 some rain
Rainy days10 days
Humidity77%💦 very humid
Dew point8°C / 46°F
Sunshine10.3 h/day
Daylight15.8 h
Wind17 km/h / 10 mph
Air quality (US AQI)37🍃 good

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Kilkenny in May

How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.

Peak crowdsKilkenny Roots Festival, Cat Laughs comedy festival, school holidays in 4 of the markets that fill it(estimated)

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Peak crowdsBusyShoulder seasonQuiet

Best months for Kilkenny's weather

Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).

Fair weatherKilkenny's weather peaks June–August, best around July.

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Best weatherFair weatherToughest weather

What's on in Kilkenny in May

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Festival

    Kilkenny Roots Festival

    1–4 MayMusic festivalCrowdedBook early

    Thirty-odd venues across the medieval streets run Americana, bluegrass and rockabilly acts from early afternoon into the night over the May bank holiday weekend, now approaching its thirtieth year. Source ↗

  • Festival

    Cat Laughs comedy festival

    28 May – 5 Jun · usuallyArts festivalCrowdedBook early

    Ireland's comedy weekend, run over the June bank holiday in pubs, halls and the castle grounds rather than one arena. The town is full and the late shows sell out long before the weekend. Source ↗

What's on around the world in May →

Nearby, and something's on

Within 300 km of Kilkenny — a day trip or a short hop — with something on this month. Never part of the comfort score.

Where is Kilkenny?

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Kilkenny in May — FAQ

Is May a good time to visit Kilkenny?
May in Kilkenny: cool, a little rain, with clean air — an excellent time to visit. It ranks #4 of 12 months for Kilkenny on SeasonMap's comfort score (83/100).
What is the weather like in Kilkenny in May?
In May, Kilkenny averages a daily high of 16°C and a low of 8.2°C, with about 56.3 mm of rain over roughly 10.4 rainy days.
What is the air quality in Kilkenny in May?
Kilkenny has a mean US Air Quality Index of about 37 in May.

Within 300 km: Dingle's Blasket Islands boats around 1 Apr – 30 Sep, and St Ives' Food and Drink Festival on 15–17 May.