The official extremes of Irish weather — the hottest, coldest, wettest and windiest days on record, and where they happened.
| Record | Value | Where | When |
|---|---|---|---|
| Highest air temperature Met Éireann marks this with an asterisk as a historical record with uncertainties. A 2023 reassessment (Dooley et al., Climate of the Past) discusses it. |
33.3°C | Kilkenny Castle, Kilkenny | 26 June 1887 |
| Highest air temperature (20th century) | 32.5°C | Boora, Offaly | 29 June 1976 |
| Highest air temperature (modern, July record) | 33°C | Phoenix Park, Dublin, Dublin | 18 July 2022 |
| Lowest air temperature | -19.1°C | Markree, Sligo | 16 January 1881 |
| Lowest air temperature (20th century) | -18.8°C | Lullymore, Kildare | 2 January 1979 |
| Lowest grass minimum temperature | -19.6°C | Glasnevin, Dublin, Dublin | 12 January 1982 |
| Highest daily rainfall | 243.5 mm | Cloone Lake, Kerry | 18 September 1993 |
| Highest hourly rainfall | 52.2 mm | Clonroche, Wexford | 27 June 1986 |
| Highest monthly rainfall | 943.5 mm | Gernapeka, Cork | December 2015 |
| Highest annual rainfall | 3964.9 mm | Ballaghbeama Gap, Kerry | 1960 |
| Lowest annual rainfall | 356.6 mm | Glasnevin, Dublin | 1887 |
| Longest absolute drought | null | Limerick, Limerick | 3 April to 10 May 1938 |
| Highest gust (3-second) Storm Éowyn |
184 km/h | Mace Head, Galway | 24 January 2025 |
| Highest sustained wind (10-minute mean) Storm Éowyn; hurricane force |
142 km/h | Mace Head, Galway | 24 January 2025 |
| Highest mean sea-level pressure | 1051.9 hPa | Valentia, Kerry | 28 January 1905 |
| Lowest mean sea-level pressure | 931.2 hPa | Limerick, Limerick | 28 November 1838 |
| Sunniest month | 308.2 hours | Valentia, Kerry | July 1955 |
| Dullest month | 2.8 hours | Sherkin Island, Cork | December 2015 |
| Record | Value | Where | When |
|---|---|---|---|
| Highest air temperature | 31.3°C | Castlederg, Tyrone | 21 July 2021 |
| Lowest air temperature | -18.7°C | Castlederg, Tyrone | 24 December 2010 |
| Highest daily minimum temperature | 19.6°C | Belfast (Whitehouse), Antrim | 14 August 2001 |
| Lowest daily maximum temperature | -11.3°C | Edenfel, Tyrone | 23 December 2010 |
| Highest 24-hour rainfall (0900–0900) | 159 mm | Tollymore Forest, Down | 31 October 1968 |
| Highest gust (low-level site) 108 knots, about 200 km/h |
124 mph | Kilkeel, Down | 12 January 1974 |
| Sunniest month Met Office asterisk: a Campbell-Stokes equivalent converted from a Kipp & Zonen total |
301.3 hours | Magilligan, Derry / Londonderry | May 2025 |
33.3°C at Kilkenny Castle, County Kilkenny, on 26 June 1887. Met Éireann marks it as a historical record with some uncertainty. In Northern Ireland the record is 31.3°C at Castlederg, on 21 July 2021.
-19.1°C at Markree, County Sligo, on 16 January 1881. Northern Ireland's is -18.7°C at Castlederg, 24 December 2010.
Met Éireann's record is 184 km/h at Mace Head, County Galway, on 24 January 2025.
met.ie ↗ · metoffice.gov.uk ↗. Met Éireann's table covers the Republic; the Met Office keeps Northern Ireland's. Some single-month records quoted elsewhere come from later Met Éireann statements and may differ from this table.