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| Clones 1978–2007 averages
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| TEMPERATURE (degrees Celsius) | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| mean daily max | 7.2 | 7.8 | 9.7 | 12.1 | 15.1 | 17.4 | 19.2 | 18.8 | 16.6 | 13.1 | 9.8 | 7.6 | 12.9 |
| mean daily min | 1.6 | 1.6 | 3.0 | 4.2 | 6.5 | 9.5 | 11.4 | 11.1 | 9.2 | 6.6 | 3.9 | 2.3 | 5.9 |
| mean temperature | 4.4 | 4.7 | 6.4 | 8.1 | 10.8 | 13.4 | 15.3 | 15.0 | 12.9 | 9.9 | 6.8 | 5.0 | 9.4 |
| absolute max. | 14.8 | 16.3 | 16.9 | 21.5 | 25.9 | 29.3 | 30.5 | 28.3 | 25.3 | 20.1 | 16.9 | 14.8 | 30.5 |
| min. maximum | -3.8 | -0.4 | 2.3 | 0.0 | 0.0 | 10.1 | 10.7 | 11.3 | 10.7 | 6.2 | 1.6 | -5.7 | -5.7 |
| max. minimum | 12.0 | 11.3 | 11.0 | 12.1 | 13.4 | 16.9 | 18.7 | 18.0 | 17.1 | 15.4 | 12.7 | 12.6 | 18.7 |
| absolute min. | -12.4 | -7.3 | -6.8 | -3.8 | -3.7 | 1.6 | 4.6 | 3.5 | 0.2 | -4.5 | -5.4 | -11.0 | -12.4 |
| mean num. of days with air frost | 9.4 | 8.5 | 5.0 | 2.5 | 0.4 | 0.0 | 0.0 | 0.0 | 0.0 | 1.1 | 4.2 | 7.4 | 38.4 |
| mean num. of days with ground frost | 17.0 | 15.0 | 13.0 | 11.0 | 6.0 | 1.0 | 0.0 | 0.0 | 2.0 | 5.0 | 12.0 | 15.0 | 97.0 |
| mean 5cm soil | 3.5 | 3.6 | 5.2 | 8.1 | 12.1 | 14.9 | 16.4 | 15.6 | 12.8 | 9.3 | 6.2 | 4.4 | 9.4 |
| mean 10cm soil | 4.0 | 4.0 | 5.3 | 7.7 | 11.1 | 14.0 | 15.6 | 15.1 | 12.7 | 9.6 | 6.7 | 4.9 | 9.2 |
| mean 20cm soil | 4.6 | 4.6 | 6.0 | 8.1 | 11.3 | 14.0 | 15.7 | 15.5 | 13.5 | 10.6 | 7.6 | 5.6 | 9.8 |
| RELATIVE HUMIDITY (%) | | | | | | | | | | | | | |
| mean at 0900UTC | 89.9 | 88.7 | 86.6 | 81.8 | 77.4 | 78.8 | 81.7 | 84.6 | 87.3 | 89.3 | 90.8 | 90.9 | 85.7 |
| mean at 1500UTC | 83.3 | 77.3 | 72.9 | 67.5 | 66.5 | 68.7 | 69.6 | 71.2 | 72.8 | 77.3 | 82.5 | 85.9 | 74.6 |
| SUNSHINE (hours) | | | | | | | | | | | | | |
| mean daily duration | 1.5 | 2.2 | 3.0 | 4.6 | 5.6 | 4.6 | 4.4 | 4.2 | 3.6 | 2.8 | 1.8 | 1.2 | 3.3 |
| greatest daily duration | 7.5 | 9.8 | 11.0 | 13.1 | 15.5 | 16.0 | 15.2 | 14.4 | 12.0 | 9.6 | 8.5 | 6.9 | 16.0 |
| mean num. of days with no sun | 12.1 | 8.3 | 6.0 | 3.8 | 2.2 | 2.6 | 2.2 | 2.8 | 4.0 | 6.9 | 10.3 | 13.2 | 74.3 |
| RAINFALL (mm) | | | | | | | | | | | | | |
| mean monthly total | 87.6 | 71.0 | 84.0 | 61.6 | 63.4 | 70.9 | 70.8 | 88.7 | 76.2 | 102.7 | 85.1 | 98.4 | 960.4 |
| greatest daily total | 30.0 | 26.9 | 34.0 | 23.5 | 37.7 | 38.1 | 50.3 | 74.6 | 27.1 | 43.8 | 33.1 | 31.9 | 74.6 |
| mean num. of days with >= 0.2mm | 20 | 17 | 20 | 16 | 16 | 17 | 18 | 18 | 18 | 20 | 19 | 19 | 218 |
| mean num. of days with >= 1.0mm | 15 | 12 | 15 | 12 | 12 | 12 | 13 | 13 | 13 | 15 | 14 | 15 | 161 |
| mean num. of days with >= 5.0mm | 6 | 5 | 6 | 4 | 4 | 5 | 4 | 5 | 5 | 7 | 6 | 7 | 64 |
| WIND (knots) | | | | | | | | | | | | | |
| mean monthly speed | 9.2 | 9.4 | 9.4 | 7.9 | 7.2 | 6.7 | 6.3 | 6.3 | 7.0 | 7.8 | 8.2 | 8.7 | 7.8 |
| max. gust | 70 | 81 | 69 | 61 | 53 | 50 | 53 | 49 | 57 | 62 | 60 | 72 | 61.4 |
| max. mean 10-minute speed | 46 | 51 | 41 | 34 | 35 | 31 | 30 | 29 | 37 | 37 | 35 | 44 | 37.5 |
| mean num. of days with gales | 0.6 | 0.4 | 0.4 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 | 0.4 | 2.2 |
| WEATHER (mean no. of days with..) | | | | | | | | | | | | | |
| snow or sleet | 4.9 | 4.7 | 3.8 | 1.1 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.6 | 2.6 | 18.0 |
| snow lying at 0900UTC | 2.8 | 1.1 | 0.8 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.2 | 1.2 | 6.2 |
| hail | 0.8 | 1.6 | 2.8 | 2.3 | 1.3 | 0.1 | 0.1 | 0.0 | 0.1 | 0.6 | 0.4 | 0.8 | 10.8 |
| thunder | 0.1 | 0.1 | 0.1 | 0.1 | 0.8 | 1.0 | 0.5 | 0.8 | 0.1 | 0.1 | 0.0 | 0.1 | 3.8 |
| fog | 3.7 | 3.6 | 2.1 | 2.2 | 1.5 | 1.3 | 1.6 | 2.9 | 4.0 | 3.5 | 4.0 | 4.4 | 34.8 |