Heat pump in a cold climate — Ireland
The 8 cities in Ireland where a weather station close enough to the city can supply a design temperature. Coldest first.
| City | Design temperature | Heating degree days | Coldest month |
|---|---|---|---|
| Letterkenny | −5.6 °C | 2,294 | Jan |
| Athlone | −4.8 °C | 2,284 | Jan |
| Tallaght | −4.5 °C | 2,173 | Jan |
| Dublin | −4.0 °C | 2,176 | Jan |
| Galway | −3.9 °C | 2,366 | Feb |
| Limerick | −3.0 °C | 1,857 | Jan |
| Sligo | −2.9 °C | 2,112 | Feb |
| Cork | −2.0 °C | 2,105 | Jan |
A city appears here only if a station within 50 km, and within 200 m of its elevation, has at least fifteen complete years of record. Where two cities share the nearest station they would carry identical numbers, so only the larger is published.