Dublin weather in May
May in Dublin: cool, a little rain, with clean air — an excellent time to visit.
#3 of 12 months in Dublin · #195 of 604 destinations to visit in May · comfort 85/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Dublin climate normals — May
| Daytime high | 15°C / 58°F | 🙂 cool |
|---|---|---|
| Nighttime low | 9°C / 48°F | |
| Feels like (high) | 13°C / 55°F | |
| Rainfall | 62 mm / 2.4 in | 🌦 some rain |
| Rainy days | 12 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 9°C / 48°F | |
| Sunshine | 11.1 h/day | |
| Daylight | 15.9 h | |
| Wind | 19 km/h / 12 mph | |
| Air quality (US AQI) | 39 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Dublin in May — FAQ
- Is May a good time to visit Dublin?
- May in Dublin: cool, a little rain, with clean air — an excellent time to visit. It ranks #3 of 12 months for Dublin on SeasonMap's comfort score (85/100).
- What is the weather like in Dublin in May?
- In May, Dublin averages a daily high of 14.6°C and a low of 8.9°C, with about 62.1 mm of rain over roughly 11.8 rainy days.
- What is the air quality in Dublin in May?
- Dublin has a mean US Air Quality Index of about 39 in May.