SeasonMapKilkenny weather in September
Ireland
September in Kilkenny: cool, a little rain, with clean air — a great time to visit.
#5 of 12 months in Kilkenny · #752 of 1383 destinations to visit in September · comfort 78/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Kilkenny in September
No notes yet. Open Kilkenny on the map to add the first one.
Kilkenny climate normals — September
| Daytime high | 17°C / 62°F | 🙂 cool |
|---|---|---|
| Nighttime low | 11°C / 51°F | |
| Feels like (high) | 15°C / 59°F | |
| Rainfall | 79 mm / 3.1 in | 🌦 some rain |
| Rainy days | 12 days | |
| Humidity | 83% | 💦 very humid |
| Dew point | 11°C / 51°F | |
| Sunshine | 6.9 h/day | |
| Daylight | 12.7 h | |
| Wind | 19 km/h / 12 mph | |
| Air quality (US AQI) | 35 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Kilkenny in September
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.
Shoulder seasonschool holidays in 3 of the markets that fill it, an ordinary month(estimated)
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.
Best weatherFair weatherToughest weather
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?
Kilkenny in September — FAQ
- Is September a good time to visit Kilkenny?
- September in Kilkenny: cool, a little rain, with clean air — a great time to visit. It ranks #5 of 12 months for Kilkenny on SeasonMap's comfort score (78/100).
- What is the weather like in Kilkenny in September?
- In September, Kilkenny averages a daily high of 16.9°C and a low of 10.6°C, with about 79.1 mm of rain over roughly 12.2 rainy days.
- What is the air quality in Kilkenny in September?
- Kilkenny has a mean US Air Quality Index of about 35 in September.
Other months in Kilkenny
Compare Kilkenny in September
Warmer or cooler than Kilkenny in September
Similar destinations in Northern Europe — September
Within 300 km: Dublin's Culture Night around 15–25 Sep, and Killarney's Red deer rut around 25 Sep – 25 Oct.