| Valentia Observatory 1991–2020 averages | |||||||||||||
| TEMPERATURE (degrees Celsius) | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| mean daily max | 9.8 | 9.9 | 10.8 | 12.4 | 14.5 | 16.6 | 17.8 | 18 | 16.9 | 14.4 | 11.8 | 10.4 | 13.6 |
| mean daily min | 5.1 | 5.1 | 5.5 | 6.7 | 8.8 | 11.1 | 12.9 | 12.8 | 11.7 | 9.5 | 7.2 | 5.8 | 8.5 |
| mean temperature | 7.4 | 7.5 | 8.2 | 9.6 | 11.7 | 13.8 | 15.3 | 15.4 | 14.3 | 12 | 9.5 | 8.1 | 11.1 |
| absolute max. | 14.6 | 17.2 | 20.4 | 22.9 | 26.6 | 28.4 | 27.6 | 28 | 28 | 21.8 | 19.5 | 15.3 | 28.4 |
| min. maximum | 1.3 | 1.8 | 0.7 | 7 | 7.5 | 11.1 | 13.6 | 13.9 | 12.3 | 7.9 | 2.3 | -0.2 | -0.2 |
| max. minimum | 12.1 | 12.2 | 13.1 | 13.3 | 15.7 | 19.1 | 19 | 19.5 | 18.1 | 17.3 | 14.4 | 13.2 | 19.5 |
| absolute min. | -6.5 | -4.8 | -5 | -2.1 | 0.6 | 4.2 | 6 | 5.5 | 2.6 | -0.7 | -3.1 | -7.7 | -7.7 |
| mean num. of days with air frost | 2.4 | 2.1 | 1.4 | 0.2 | 0 | 0 | 0 | 0 | 0 | 0 | 0.4 | 2 | 8.5 |
| mean num. of days with ground frost | 7.7 | 7.3 | 7 | 4.1 | 1.2 | 0 | 0 | 0 | 0.2 | 1.8 | 4.2 | 6.3 | 39.9 |
| mean 5cm soil | 6.1 | 6.1 | 7.1 | 9.6 | 13 | 15.7 | 16.8 | 16.3 | 14.2 | 11.1 | 8.5 | 6.8 | 10.9 |
| mean 10cm soil | 6.4 | 6.4 | 7.3 | 9.4 | 12.5 | 15.2 | 16.5 | 16.1 | 14.2 | 11.4 | 8.8 | 7.1 | 10.9 |
| mean 20cm soil | 7 | 7 | 7.9 | 9.9 | 12.7 | 15.4 | 16.7 | 16.5 | 14.9 | 12.2 | 9.5 | 7.7 | 11.4 |
| RELATIVE HUMIDITY (%) | |||||||||||||
| mean at 0900UTC | 82.9 | 82.7 | 80.8 | 77.4 | 76.9 | 79.3 | 83.5 | 83.2 | 83.1 | 83.4 | 83.8 | 82.8 | 81.6 |
| mean at 1500UTC | 78.7 | 75.8 | 72.9 | 71.2 | 72.5 | 75.6 | 79.5 | 77.9 | 76.4 | 76.8 | 78.8 | 79.2 | 76.3 |
| SUNSHINE (hours) | |||||||||||||
| mean daily duration | 1.5 | 2.3 | 3.4 | 5.3 | 5.7 | 5.6 | 4.4 | 4.6 | 4 | 2.9 | 1.8 | 1.2 | 3.6 |
| greatest daily duration | 7.6 | 9.2 | 11.2 | 13.4 | 15.3 | 15.9 | 15.2 | 13.9 | 11.8 | 9.6 | 8.1 | 6.5 | 15.9 |
| mean num. of days with no sun | 10.4 | 7.5 | 5.9 | 2.9 | 2.6 | 3.3 | 3.8 | 2.9 | 3.5 | 5.9 | 8.3 | 10.7 | 67.7 |
| RAINFALL (mm) | |||||||||||||
| mean monthly total | 187 | 137.1 | 116.1 | 108.4 | 94.4 | 100.8 | 117.2 | 114.2 | 129.8 | 173 | 189.2 | 179.4 | 1646.5 |
| greatest daily total | 41.6 | 51.6 | 49.1 | 55.1 | 42.1 | 51.8 | 60.6 | 53.1 | 99.3 | 131.6 | 56.7 | 56.3 | 131.6 |
| mean num. of days with >= 0.2mm | 23.9 | 20.8 | 19.9 | 18.4 | 18.2 | 17.6 | 20.8 | 20.8 | 19.9 | 21.8 | 24.2 | 23.8 | 250.1 |
| mean num. of days with >= 1.0mm | 20.8 | 17.8 | 16.4 | 14.1 | 13.5 | 12.8 | 16 | 15.6 | 16.5 | 18.2 | 21 | 20.4 | 203.1 |
| mean num. of days with >= 5.0mm | 12.7 | 9.5 | 8.1 | 7 | 6.3 | 6.1 | 7.1 | 7.3 | 7.9 | 10.6 | 12 | 11.9 | 106.5 |
| WIND (knots) | |||||||||||||
| mean monthly speed | 11.3 | 11 | 9.9 | 9.1 | 8.6 | 8.1 | 7.8 | 7.8 | 8.3 | 9.2 | 10.1 | 11.2 | 9.4 |
| max. gust | 82 | 74 | 73 | 65 | 63 | 50 | 48 | 52 | 67 | 68 | 69 | 88 | 88 |
| max. mean 10-minute speed | 49 | 53 | 47 | 44 | 34 | 32 | 30 | 31 | 40 | 39 | 49 | 60 | 60 |
| mean num. of days with gales | 2.2 | 1.3 | 0.7 | 0.2 | 0.1 | 0 | 0 | 0 | 0.1 | 0.5 | 0.5 | 1.3 | 6.8 |