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| Kilkenny 1971–2000 averages
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| TEMPERATURE (degrees Celsius) | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| mean daily max | 8.1 | 8.5 | 10.3 | 12.6 | 15.4 | 18.0 | 20.3 | 20.1 | 17.5 | 13.9 | 10.4 | 8.8 | 13.7 |
| mean daily min | 1.6 | 2.0 | 3.0 | 4.0 | 6.3 | 9.0 | 11.2 | 10.7 | 8.6 | 6.4 | 3.4 | 2.4 | 5.7 |
| mean temperature | 4.8 | 5.2 | 6.7 | 8.3 | 10.9 | 13.5 | 15.8 | 15.4 | 13.1 | 10.1 | 6.9 | 5.6 | 9.7 |
| absolute max. | 14.1 | 15.6 | 17.9 | 23.5 | 26.0 | 31.5 | 31.4 | 30.8 | 26.6 | 21.4 | 17.4 | 15.5 | 31.5 |
| min. maximum | -3.3 | -0.3 | 1.6 | 5.0 | 7.5 | 9.1 | 12.3 | 12.2 | 9.6 | 7.5 | 2.1 | -1.9 | -3.3 |
| max. minimum | 11.4 | 11.9 | 11.6 | 12.3 | 14.5 | 16.0 | 17.6 | 18.0 | 16.9 | 15.5 | 13.3 | 12.9 | 18.0 |
| absolute min. | -14.1 | -8.5 | -7.9 | -3.5 | -3.3 | 0.5 | 3.1 | 2.2 | -1.6 | -4.8 | -7.0 | -8.8 | -14.1 |
| mean num. of days with air frost | 11.0 | 8.5 | 5.7 | 3.6 | 0.8 | 0.0 | 0.0 | 0.0 | 0.4 | 2.2 | 7.3 | 9.2 | 48.9 |
| mean num. of days with ground frost | 19.0 | 15.0 | 14.0 | 13.0 | 8.0 | 2.0 | 0.0 | 1.0 | 3.0 | 8.0 | 14.0 | 17.0 | 114.0 |
| mean 5cm soil | 3.3 | 3.3 | 4.8 | 7.9 | 12.1 | 15.7 | 17.1 | 15.8 | 12.7 | 9.2 | 5.4 | 4.1 | 9.3 |
| mean 10cm soil | 3.6 | 3.6 | 4.8 | 7.4 | 11.2 | 14.7 | 16.3 | 15.2 | 12.5 | 9.4 | 5.8 | 4.4 | 9.1 |
| mean 20cm soil | 4.3 | 4.4 | 5.7 | 8.1 | 11.4 | 14.8 | 16.6 | 15.9 | 13.6 | 10.6 | 7.0 | 5.2 | 9.8 |
| RELATIVE HUMIDITY (%) | | | | | | | | | | | | | |
| mean at 0900UTC | 88.0 | 87.4 | 84.6 | 78.8 | 75.9 | 76.3 | 78.1 | 80.9 | 84.6 | 87.8 | 89.4 | 89.3 | 83.4 |
| mean at 1500UTC | 79.8 | 74.8 | 69.3 | 63.5 | 63.8 | 65.4 | 65.1 | 65.0 | 67.6 | 74.3 | 78.8 | 82.1 | 70.8 |
| SUNSHINE (hours) | | | | | | | | | | | | | |
| mean daily duration | 1.6 | 2.2 | 3.0 | 4.7 | 5.5 | 4.9 | 4.6 | 4.5 | 3.9 | 2.8 | 2.1 | 1.4 | 3.4 |
| greatest daily duration | 8.2 | 9.6 | 11.6 | 13.8 | 15.8 | 16.3 | 16.0 | 14.5 | 11.8 | 10.2 | 8.2 | 7.3 | 16.3 |
| mean num. of days with no sun | 11.0 | 7.7 | 5.7 | 2.4 | 1.7 | 1.5 | 1.9 | 2.1 | 3.3 | 5.5 | 9.3 | 12.1 | 64.1 |
| RAINFALL (mm) | | | | | | | | | | | | | |
| mean monthly total | 86.7 | 68.5 | 63.9 | 52.3 | 61.1 | 53.5 | 54.1 | 74.5 | 72.6 | 89.2 | 79.1 | 91.2 | 846.9 |
| greatest daily total | 25.2 | 24.8 | 26.1 | 24.5 | 32.3 | 24.5 | 66.4 | 58.3 | 37.3 | 42.7 | 34.2 | 43.8 | 66.4 |
| mean num. of days with >= 0.2mm | 18 | 16 | 17 | 14 | 16 | 14 | 13 | 14 | 15 | 18 | 17 | 18 | 190 |
| mean num. of days with >= 1.0mm | 14 | 12 | 12 | 9 | 11 | 9 | 9 | 10 | 10 | 13 | 12 | 13 | 134 |
| mean num. of days with >= 5.0mm | 6 | 5 | 4 | 3 | 4 | 3 | 2 | 4 | 4 | 5 | 5 | 6 | 51 |
| WIND (knots) | | | | | | | | | | | | | |
| mean monthly speed | 7.6 | 7.6 | 7.8 | 6.7 | 6.3 | 5.8 | 5.6 | 5.4 | 5.9 | 6.6 | 6.7 | 7.1 | 6.6 |
| max. gust | 77 | 72 | 62 | 56 | 54 | 45 | 46 | 50 | 54 | 57 | 56 | 75 | 77 |
| max. mean 10-minute speed | 44 | 39 | 43 | 34 | 32 | 27 | 27 | 29 | 30 | 37 | 36 | 47 | 47 |
| mean num. of days with gales | 0.6 | 0.3 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 | 0.5 | 1.7 |
| WEATHER (mean no. of days with..) | | | | | | | | | | | | | |
| snow or sleet | 4.3 | 3.8 | 2.5 | 0.9 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.3 | 2.0 | 13.9 |
| snow lying at 0900UTC | 1.5 | 1.1 | 0.3 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.3 | 3.3 |
| hail | 1.0 | 1.0 | 2.4 | 2.6 | 1.3 | 0.6 | 0.1 | 0.1 | 0.1 | 0.4 | 0.2 | 0.2 | 10.0 |
| thunder | 0.1 | 0.0 | 0.1 | 0.4 | 0.8 | 0.9 | 0.9 | 1.0 | 0.3 | 0.2 | 0.1 | 0.1 | 4.8 |
| fog | 4.0 | 2.9 | 2.1 | 2.1 | 1.9 | 1.6 | 2.1 | 3.9 | 4.6 | 4.2 | 3.7 | 4.4 | 37.6 |