SeasonMapIreland in September
September is Ireland's 6th-best month (rank 6 of 12): its 7 destinations average 78/100, led by Killarney at 82 — 17°C and 14 rainy days — while Dingle trails at 68 with 89 mm of rain.
#6 of 12 months for Ireland · 7 destinations · updated September 2026 · climate normals from ERA5 reanalysis
Where in Ireland in September
| # | Place | Type | Feels-like high | Rain | Comfort | At its best |
|---|---|---|---|---|---|---|
| 1 | Killarney | Trekking hub | 17°C | 109 mm · 14 days | 82 tier A | — |
| 2 | Cork | City | 18°C | 87 mm · 12 days | 80 tier A | — |
| 3 | Dublin | City | 16°C | 98 mm · 14 days | 80 tier A | — |
| 4 | Kilkenny | City | 17°C | 84 mm · 13 days | 79 tier B | — |
| 5 | Clifden | Trekking hub | 16°C | 102 mm · 16 days | 78 tier B | — |
| 6 | Galway | City | 17°C | 97 mm · 14 days | 77 tier B | — |
| 7 | Dingle | Beach | 17°C | 89 mm · 15 days | 68 tier C | — |
Comfort is SeasonMap's 0–100 score; each place is judged through the lens that suits it — beaches on beach weather, ski resorts on snow. "At its best" means September is one of that place's own top three months. Feels-like highs fold in humidity, wind and sun.