SeasonMapClifden (Connemara) weather in May
Ireland
May in Clifden: cool, a little rain, with clean air — one of the best months to visit.
#1 of 12 months in Clifden · #378 of 1383 destinations to visit in May · comfort 86/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Clifden in May
No notes yet. Open Clifden on the map to add the first one.
Clifden climate normals — May
| Daytime high | 14°C / 57°F | 🙂 cool |
|---|---|---|
| Nighttime low | 9°C / 48°F | |
| Sea temperature | 13°C / 56°F | 🥶 cold sea |
| Rainfall | 78 mm / 3.1 in | 🌦 some rain |
| Rainy days | 15 days | |
| Humidity | 80% | 💦 very humid |
| Dew point | 9°C / 48°F | |
| Sunshine | 11.1 h/day | |
| Daylight | 15.9 h | |
| Wind | 25 km/h / 16 mph | |
| Air quality (US AQI) | 41 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Clifden 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.
Busyschool holidays in 4 of the markets that fill it, one of its best months for weather(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Clifden'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).
Best weatherClifden's weather peaks May–July.
Best weatherFair weatherToughest weather
What's on in Clifden in May
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Connemara walking season
15 Apr – 10 Oct · usuallyTrail seasonDiamond Hill in the national park, the Sky Road and the Twelve Bens are at their most reliable from mid-spring to early autumn. Outside that the bog paths hold water and the light runs out mid-afternoon. Source ↗
- Season
Midge season
25 May – 15 Sep · usuallyInsect seasonStill evenings near bog and water are the problem, not the days. Anything with an Atlantic breeze on it stays clear, which is most of the coast road and none of the inland lakes. Source ↗
Nearby, and something's on
Within 300 km of Clifden — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Clifden?
Clifden in May — FAQ
- Is May a good time to visit Clifden?
- May in Clifden: cool, a little rain, with clean air — one of the best months to visit. It ranks #1 of 12 months for Clifden on SeasonMap's comfort score (86/100).
- What is the weather like in Clifden in May?
- In May, Clifden averages a daily high of 13.7°C and a low of 9°C, with about 77.7 mm of rain over roughly 15.2 rainy days.
- What is the air quality in Clifden in May?
- Clifden has a mean US Air Quality Index of about 41 in May.
Other months in Clifden
Compare Clifden in May
Warmer or cooler than Clifden in May
Similar destinations in Northern Europe — May
Within 300 km: Dingle's Blasket Islands boats around 1 Apr – 30 Sep, and Killarney's Rally of the Lakes on 1–3 May.