Average monthly temperatures by county in Ireland
The average daytime high for each month in each county, in °C. Tap a county for the night-time lows as well. Inland counties are warmer in summer and colder in winter than the coasts. Tap a county for its full page, or compare counties side by side.
Figures are averages for 2021–2025 at each county town, from the ERA5 weather reanalysis via Open-Meteo. They describe typical lowland weather in each county; hills and exposed coasts are wetter and windier.
| County | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year avg |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Leinster | |||||||||||||
| CarlowCarlow | 7 | 9 | 11 | 13 | 16 | 18 | 20 | 20 | 17 | 14 | 10 | 9 | 14 |
| DublinDublin | 8 | 10 | 11 | 12 | 15 | 18 | 20 | 20 | 17 | 15 | 11 | 10 | 14 |
| KildareNaas | 7 | 9 | 11 | 13 | 16 | 18 | 20 | 20 | 17 | 14 | 11 | 9 | 14 |
| KilkennyKilkenny | 7 | 9 | 11 | 12 | 16 | 18 | 19 | 19 | 17 | 14 | 10 | 9 | 14 |
| LaoisPortlaoise | 7 | 9 | 11 | 13 | 16 | 18 | 20 | 20 | 17 | 14 | 10 | 8 | 14 |
| LongfordLongford | 7 | 9 | 11 | 13 | 16 | 18 | 19 | 19 | 17 | 14 | 10 | 8 | 13 |
| LouthDundalk | 7 | 9 | 11 | 12 | 15 | 18 | 19 | 19 | 17 | 14 | 11 | 9 | 13 |
| MeathNavan | 7 | 9 | 11 | 12 | 16 | 18 | 20 | 19 | 17 | 14 | 11 | 9 | 14 |
| OffalyTullamore | 7 | 9 | 11 | 13 | 16 | 18 | 19 | 19 | 17 | 14 | 10 | 8 | 14 |
| WestmeathMullingar | 7 | 9 | 10 | 12 | 16 | 18 | 19 | 19 | 17 | 14 | 10 | 8 | 13 |
| WexfordWexford | 8 | 10 | 11 | 12 | 15 | 18 | 20 | 19 | 17 | 14 | 11 | 10 | 14 |
| WicklowWicklow | 8 | 9 | 10 | 12 | 15 | 17 | 19 | 19 | 17 | 14 | 11 | 9 | 13 |
| Munster | |||||||||||||
| ClareEnnis | 8 | 10 | 11 | 13 | 16 | 18 | 19 | 19 | 17 | 15 | 11 | 9 | 14 |
| CorkCork | 8 | 10 | 11 | 13 | 16 | 18 | 20 | 20 | 17 | 14 | 11 | 9 | 14 |
| KerryTralee | 8 | 10 | 11 | 13 | 16 | 17 | 18 | 19 | 17 | 14 | 11 | 9 | 14 |
| LimerickLimerick | 8 | 10 | 11 | 13 | 16 | 18 | 19 | 19 | 17 | 14 | 11 | 9 | 14 |
| TipperaryThurles | 7 | 9 | 10 | 12 | 16 | 18 | 19 | 19 | 17 | 14 | 10 | 8 | 13 |
| WaterfordWaterford | 8 | 10 | 11 | 12 | 16 | 18 | 20 | 20 | 17 | 14 | 11 | 9 | 14 |
| Connacht | |||||||||||||
| GalwayGalway | 8 | 10 | 11 | 13 | 16 | 18 | 19 | 19 | 17 | 14 | 11 | 9 | 14 |
| LeitrimCarrick-on-Shannon | 7 | 9 | 11 | 13 | 16 | 18 | 19 | 19 | 17 | 14 | 10 | 8 | 13 |
| MayoCastlebar | 8 | 9 | 11 | 13 | 15 | 17 | 18 | 18 | 17 | 14 | 11 | 9 | 13 |
| RoscommonRoscommon | 7 | 9 | 11 | 13 | 16 | 18 | 19 | 19 | 17 | 14 | 10 | 8 | 13 |
| SligoSligo | 7 | 9 | 10 | 12 | 15 | 17 | 18 | 18 | 16 | 13 | 10 | 8 | 13 |
| Ulster | |||||||||||||
| CavanCavan | 7 | 9 | 10 | 12 | 16 | 18 | 19 | 19 | 17 | 14 | 10 | 8 | 13 |
| DonegalLetterkenny | 7 | 9 | 10 | 12 | 15 | 17 | 18 | 18 | 16 | 13 | 10 | 8 | 13 |
| MonaghanMonaghan | 7 | 9 | 10 | 12 | 16 | 18 | 19 | 19 | 17 | 14 | 10 | 8 | 13 |
| AntrimBelfast | 7 | 9 | 10 | 12 | 15 | 18 | 19 | 19 | 16 | 14 | 10 | 8 | 13 |
| ArmaghArmagh | 7 | 9 | 11 | 12 | 16 | 18 | 19 | 19 | 17 | 14 | 10 | 8 | 13 |
| DownDownpatrick | 7 | 9 | 10 | 11 | 15 | 17 | 18 | 19 | 16 | 14 | 11 | 9 | 13 |
| FermanaghEnniskillen | 7 | 9 | 10 | 12 | 16 | 17 | 19 | 19 | 17 | 14 | 10 | 8 | 13 |
| DerryDerry | 7 | 9 | 10 | 12 | 15 | 17 | 18 | 18 | 16 | 13 | 10 | 8 | 13 |
| TyroneOmagh | 7 | 8 | 10 | 12 | 15 | 17 | 18 | 18 | 16 | 13 | 10 | 8 | 13 |