SeasonMapIreland in December
December is Ireland's weakest month (rank 12 of 12): its 7 destinations average 52/100, led by Killarney at 61 — 9°C and 17 rainy days — while Dublin is cooler at 5°C and scores 54.
#12 of 12 months for Ireland · 7 destinations · updated September 2026 · climate normals from ERA5 reanalysis
Where in Ireland in December
| # | Place | Type | Feels-like high | Rain | Comfort | At its best |
|---|---|---|---|---|---|---|
| 1 | Killarney | Trekking hub | 9°C | 126 mm · 17 days | 61 tier C | — |
| 2 | Cork | City | 9°C | 91 mm · 14 days | 55 tier D | — |
| 3 | Clifden | Trekking hub | 9°C | 156 mm · 20 days | 54 tier D | — |
| 4 | Dublin | City | 5°C | 86 mm · 14 days | 54 tier D | — |
| 5 | Kilkenny | City | 8°C | 86 mm · 13 days | 53 tier D | — |
| 6 | Galway | City | 8°C | 103 mm · 17 days | 52 tier D | — |
| 7 | Dingle | Beach | 10°C | 131 mm · 19 days | 36 tier F | — |
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 December is one of that place's own top three months. Feels-like highs fold in humidity, wind and sun.
What's on in Ireland in December
- Christmas in Killarney · Killarney · 20 Nov – 31 Dec (usually)
- Other Voices · Dingle · 28 Nov – 10 Dec (usually)
- Wren Day · Dingle · 26 Dec
- Cork at Christmas · Cork · 15 Nov – 24 Dec (usually)
Seasons in force
Peak crowds at 1 of Ireland's 3 well-known places this month.