| 1 | Ballyshannon (Cathleens Fall) | 964 | Max temperature | 54.50 | -8.18 | 38 | -4.3 | 30.3 | 3.2 | 1971 | 2021 | 50 |
| 2 | Ballyshannon (Cathleens Fall) | 964 | Mean temperature | 54.50 | -8.18 | 38 | -7.4 | 23.0 | 3.5 | 1971 | 2021 | 50 |
| 3 | Ballyshannon (Cathleens Fall) | 964 | Min temperature | 54.50 | -8.18 | 38 | -10.5 | 19.5 | 3.3 | 1971 | 2021 | 50 |
| 4 | Birr | 120 | Max temperature | 53.09 | -7.88 | 70 | -6.9 | 31.2 | 1.9 | 1954 | 2021 | 67 |
| 5 | Birr | 120 | Mean temperature | 53.09 | -7.88 | 70 | -8.4 | 24.8 | 2.0 | 1954 | 2021 | 67 |
| 6 | Birr | 120 | Min temperature | 53.09 | -7.88 | 70 | -14.6 | 18.9 | 1.9 | 1954 | 2021 | 67 |
| 7 | Casement Aerodrome | 970 | Max temperature | 53.31 | -6.44 | 94 | -4.6 | 31.0 | 0.9 | 1961 | 2021 | 60 |
| 8 | Casement Aerodrome | 970 | Mean temperature | 53.31 | -6.44 | 94 | -7.8 | 23.3 | 1.0 | 1961 | 2021 | 60 |
| 9 | Casement Aerodrome | 970 | Min temperature | 53.31 | -6.44 | 94 | -13.7 | 18.4 | 0.9 | 1961 | 2021 | 60 |
| 10 | Claremorris | 2140 | Max temperature | 53.72 | -8.98 | 69 | -4.8 | 30.5 | 0.9 | 1950 | 2020 | 70 |
| 11 | Claremorris | 2140 | Mean temperature | 53.72 | -8.98 | 69 | -9.8 | 23.3 | 0.9 | 1950 | 2020 | 70 |
| 12 | Claremorris | 2140 | Min temperature | 53.72 | -8.98 | 69 | -14.9 | 17.9 | 0.7 | 1950 | 2020 | 70 |
| 13 | Derrygreenagh | 1646 | Max temperature | 53.39 | -7.26 | 90 | -4.5 | 31.1 | 7.4 | 1961 | 2021 | 60 |
| 14 | Derrygreenagh | 1646 | Mean temperature | 53.39 | -7.26 | 90 | -8.4 | 23.5 | 8.8 | 1961 | 2021 | 60 |
| 15 | Derrygreenagh | 1646 | Min temperature | 53.39 | -7.26 | 90 | -15.5 | 20.9 | 8.5 | 1961 | 2021 | 60 |
| 16 | Dublin (Glasnevin) | 1704 | Max temperature | 53.37 | -6.27 | 21 | -2.9 | 31.0 | 8.1 | 1961 | 2021 | 60 |
| 17 | Dublin (Glasnevin) | 1704 | Mean temperature | 53.37 | -6.27 | 21 | -5.7 | 23.2 | 8.3 | 1961 | 2021 | 60 |
| 18 | Dublin (Glasnevin) | 1704 | Min temperature | 53.37 | -6.27 | 21 | -11.5 | 19.8 | 8.1 | 1961 | 2021 | 60 |
| 19 | Dublin (Merrion Square) | 1715 | Max temperature | 53.34 | -6.25 | 13 | -1.4 | 30.0 | 8.1 | 1961 | 2021 | 60 |
| 20 | Dublin (Merrion Square) | 1715 | Mean temperature | 53.34 | -6.25 | 13 | -4.8 | 23.9 | 8.3 | 1961 | 2021 | 60 |
| 21 | Dublin (Merrion Square) | 1715 | Min temperature | 53.34 | -6.25 | 13 | -11.0 | 20.3 | 8.1 | 1961 | 2021 | 60 |
| 22 | Dublin Airport | 1718 | Max temperature | 53.43 | -6.24 | 71 | -4.6 | 31.3 | 0.8 | 1867 | 2021 | 154 |
| 23 | Dublin Airport | 1718 | Mean temperature | 53.43 | -6.24 | 71 | -7.6 | 23.1 | 0.5 | 1881 | 2021 | 140 |
| 24 | Dublin Airport | 1718 | Min temperature | 53.43 | -6.24 | 71 | -12.1 | 19.2 | 1.4 | 1867 | 2021 | 154 |
| 25 | Dublin Phoenix Park | 121 | Max temperature | 53.36 | -6.32 | 49 | -4.9 | 31.3 | 2.5 | 1867 | 2021 | 154 |
| 26 | Dublin Phoenix Park | 121 | Mean temperature | 53.36 | -6.32 | 49 | -8.1 | 23.1 | 2.3 | 1881 | 2021 | 140 |
| 27 | Dublin Phoenix Park | 121 | Min temperature | 53.36 | -6.32 | 49 | -13.8 | 19.2 | 3.1 | 1867 | 2021 | 154 |
| 28 | Dunsany Grange | 3547 | Max temperature | 53.50 | -6.70 | 84 | -5.3 | 30.4 | 7.5 | 1961 | 2021 | 60 |
| 29 | Dunsany Grange | 3547 | Mean temperature | 53.50 | -6.70 | 84 | -9.6 | 23.6 | 8.4 | 1961 | 2021 | 60 |
| 30 | Dunsany Grange | 3547 | Min temperature | 53.50 | -6.70 | 84 | -14.4 | 18.5 | 7.3 | 1961 | 2021 | 60 |
| 31 | Galway | 441 | Max temperature | 53.28 | -9.02 | 8 | -4.4 | 31.7 | 19.7 | 1861 | 2002 | 141 |
| 32 | Galway | 441 | Mean temperature | 53.28 | -9.02 | 8 | -8.0 | 25.8 | 19.6 | 1861 | 2002 | 141 |
| 33 | Galway | 441 | Min temperature | 53.28 | -9.02 | 8 | -11.7 | 20.6 | 19.7 | 1861 | 2002 | 141 |
| 34 | Glenties Hatchery | 1739 | Max temperature | 54.79 | -8.29 | 44 | -3.0 | 31.0 | 7.5 | 1961 | 2021 | 60 |
| 35 | Glenties Hatchery | 1739 | Mean temperature | 54.79 | -8.29 | 44 | -5.7 | 23.2 | 9.3 | 1961 | 2021 | 60 |
| 36 | Glenties Hatchery | 1739 | Min temperature | 54.79 | -8.29 | 44 | -12.0 | 18.8 | 8.1 | 1961 | 2021 | 60 |
| 37 | Gurteen | 3548 | Max temperature | 53.03 | -8.01 | 76 | -6.9 | 31.2 | 1.9 | 1954 | 2021 | 67 |
| 38 | Gurteen | 3548 | Mean temperature | 53.03 | -8.01 | 76 | -8.4 | 24.8 | 2.0 | 1954 | 2021 | 67 |
| 39 | Gurteen | 3548 | Min temperature | 53.03 | -8.01 | 76 | -14.6 | 18.9 | 1.9 | 1954 | 2021 | 67 |
| 40 | Malin Head | 122 | Max temperature | 55.37 | -7.34 | 21 | -1.0 | 27.1 | 1.3 | 1955 | 2021 | 66 |
| 41 | Malin Head | 122 | Mean temperature | 55.37 | -7.34 | 21 | -2.2 | 22.7 | 1.3 | 1955 | 2021 | 66 |
| 42 | Malin Head | 122 | Min temperature | 55.37 | -7.34 | 21 | -6.2 | 18.5 | 1.2 | 1955 | 2021 | 66 |
| 43 | Markree Castle | 1756 | Max temperature | 54.17 | -8.46 | 39 | -3.2 | 30.0 | 27.2 | 1966 | 2021 | 55 |
| 44 | Markree Castle | 1756 | Mean temperature | 54.17 | -8.46 | 39 | -6.5 | 22.2 | 29.1 | 1966 | 2021 | 55 |
| 45 | Markree Castle | 1756 | Min temperature | 54.17 | -8.46 | 39 | -13.5 | 18.4 | 27.7 | 1966 | 2021 | 55 |
| 46 | Roches Point | 2135 | Max temperature | 51.79 | -8.24 | 43 | -3.3 | 27.5 | 11.7 | 1955 | 2021 | 66 |
| 47 | Roches Point | 2135 | Mean temperature | 51.79 | -8.24 | 43 | -5.2 | 23.0 | 6.9 | 1955 | 2021 | 66 |
| 48 | Roches Point | 2135 | Min temperature | 51.79 | -8.24 | 43 | -7.2 | 19.2 | 6.0 | 1955 | 2021 | 66 |
| 49 | Shannon | 2139 | Max temperature | 52.69 | -8.92 | 6 | -5.9 | 32.0 | 1.6 | 1945 | 2021 | 76 |
| 50 | Shannon | 2139 | Mean temperature | 52.69 | -8.92 | 6 | -7.6 | 24.6 | 1.6 | 1945 | 2021 | 76 |
| 51 | Shannon | 2139 | Min temperature | 52.69 | -8.92 | 6 | -11.2 | 19.4 | 1.6 | 1945 | 2021 | 76 |
| 52 | Valentia Observatory | 123 | Max temperature | 51.94 | -10.22 | 9 | -1.5 | 28.5 | 3.7 | 1931 | 2021 | 90 |
| 53 | Valentia Observatory | 123 | Min temperature | 51.94 | -10.22 | 9 | -7.7 | 20.6 | 2.0 | 1931 | 2021 | 90 |
| 54 | Warrenstown | 1759 | Max temperature | 53.52 | -6.61 | 90 | -5.3 | 30.4 | 7.5 | 1961 | 2021 | 60 |
| 55 | Warrenstown | 1759 | Mean temperature | 53.52 | -6.61 | 90 | -9.6 | 23.6 | 8.4 | 1961 | 2021 | 60 |
| 56 | Warrenstown | 1759 | Min temperature | 53.52 | -6.61 | 90 | -14.4 | 18.5 | 7.3 | 1961 | 2021 | 60 |