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| Clones 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 | 7.0 | 7.7 | 9.5 | 11.8 | 14.8 | 17.2 | 19.1 | 18.7 | 16.3 | 13.0 | 9.4 | 7.6 | 12.7 |
| mean daily min | 1.6 | 1.7 | 2.8 | 3.9 | 6.2 | 9.0 | 11.2 | 10.8 | 8.8 | 6.5 | 3.3 | 2.4 | 5.7 |
| mean temperature | 4.3 | 4.7 | 6.2 | 7.9 | 10.5 | 13.1 | 15.2 | 14.8 | 12.5 | 9.7 | 6.4 | 5.0 | 9.2 |
| absolute max. | 14.0 | 16.3 | 16.4 | 21.9 | 25.9 | 29.3 | 30.5 | 28.3 | 25.3 | 20.1 | 16.2 | 14.8 | 30.5 |
| min. maximum | -3.8 | -0.4 | 2.3 | 0.0 | 0.0 | 9.2 | 10.7 | 11.3 | 8.3 | 6.2 | 0.1 | -5.7 | -5.7 |
| max. minimum | 12.0 | 11.3 | 11.0 | 12.1 | 12.7 | 15.4 | 17.7 | 18.0 | 17.1 | 15.4 | 12.5 | 12.6 | 18.0 |
| absolute min. | -12.4 | -9.0 | -6.8 | -3.9 | -3.7 | 1.6 | 4.3 | 2.4 | -0.2 | -4.5 | -5.6 | -11.0 | -12.4 |
| mean num. of days with air frost | 9.7 | 7.6 | 5.1 | 2.7 | 0.6 | 0.0 | 0.0 | 0.0 | 0.0 | 1.0 | 5.4 | 7.5 | 39.6 |
| mean num. of days with ground frost | 16.0 | 14.0 | 13.0 | 11.0 | 7.0 | 1.0 | 0.0 | 0.0 | 2.0 | 5.0 | 12.0 | 14.0 | 95.0 |
| mean 5cm soil | 3.1 | 2.9 | 4.4 | 7.6 | 11.6 | 14.8 | 16.0 | 15.0 | 12.2 | 9.1 | 5.3 | 4.0 | 8.8 |
| mean 10cm soil | 3.5 | 3.4 | 4.6 | 7.0 | 10.4 | 13.6 | 14.9 | 14.3 | 12.0 | 9.4 | 5.9 | 4.5 | 8.6 |
| mean 20cm soil | 4.2 | 4.1 | 5.4 | 7.5 | 10.6 | 13.6 | 15.0 | 14.8 | 13.0 | 10.4 | 7.0 | 5.3 | 9.2 |
| RELATIVE HUMIDITY (%) | | | | | | | | | | | | | |
| mean at 0900UTC | 90.0 | 88.8 | 86.8 | 82.4 | 78.0 | 78.6 | 81.9 | 84.9 | 87.6 | 89.1 | 90.8 | 90.5 | 85.8 |
| mean at 1500UTC | 83.8 | 78.5 | 73.3 | 68.1 | 66.6 | 68.3 | 70.1 | 70.9 | 73.2 | 77.5 | 82.7 | 86.0 | 74.9 |
| SUNSHINE (hours) | | | | | | | | | | | | | |
| mean daily duration | 1.4 | 2.0 | 2.9 | 4.5 | 5.4 | 4.8 | 4.4 | 4.3 | 3.6 | 2.6 | 1.8 | 1.1 | 3.2 |
| greatest daily duration | 7.5 | 9.4 | 11.0 | 13.4 | 15.5 | 16.0 | 15.7 | 14.4 | 12.0 | 9.6 | 8.5 | 6.8 | 16.0 |
| mean num. of days with no sun | 13.2 | 9.0 | 6.3 | 3.9 | 2.2 | 2.7 | 2.5 | 2.8 | 4.3 | 7.1 | 10.3 | 14.0 | 78.3 |
| RAINFALL (mm) | | | | | | | | | | | | | |
| mean monthly total | 91.5 | 73.1 | 79.7 | 58.9 | 57.2 | 68.4 | 67.2 | 85.8 | 78.6 | 96.0 | 88.3 | 94.8 | 939.5 |
| greatest daily total | 29.4 | 29.5 | 34.0 | 23.5 | 24.2 | 38.1 | 28.1 | 74.6 | 25.9 | 43.8 | 34.4 | 31.9 | 74.6 |
| mean num. of days with >= 0.2mm | 20 | 17 | 19 | 16 | 16 | 16 | 18 | 18 | 17 | 20 | 19 | 20 | 216 |
| mean num. of days with >= 1.0mm | 15 | 13 | 15 | 11 | 12 | 11 | 13 | 13 | 13 | 15 | 14 | 15 | 160 |
| mean num. of days with >= 5.0mm | 6 | 5 | 5 | 4 | 3 | 4 | 4 | 5 | 5 | 6 | 6 | 7 | 60 |
| WIND (knots) | | | | | | | | | | | | | |
| mean monthly speed | 9.4 | 9.4 | 9.5 | 8.0 | 7.3 | 6.6 | 6.2 | 6.2 | 6.9 | 7.9 | 8.2 | 8.9 | 7.9 |
| max. gust | 77 | 81 | 69 | 61 | 53 | 57 | 53 | 49 | 59 | 62 | 64 | 72 | 81 |
| max. mean 10-minute speed | 46 | 51 | 41 | 35 | 35 | 36 | 30 | 30 | 35 | 37 | 35 | 44 | 51 |
| mean num. of days with gales | 0.9 | 0.5 | 0.5 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 | 0.1 | 0.4 | 2.7 |
| WEATHER (mean no. of days with..) | | | | | | | | | | | | | |
| snow or sleet | 6.1 | 5.1 | 4.1 | 1.6 | 0.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.2 | 3.0 | 21.5 |
| snow lying at 0900UTC | 3.3 | 1.3 | 0.9 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.2 | 1.2 | 7.0 |
| hail | 1.1 | 1.6 | 3.4 | 2.8 | 1.5 | 0.4 | 0.1 | 0.0 | 0.3 | 0.7 | 0.8 | 1.0 | 13.7 |
| thunder | 0.1 | 0.1 | 0.1 | 0.2 | 0.8 | 1.2 | 0.7 | 0.8 | 0.2 | 0.1 | 0.1 | 0.1 | 4.5 |
| fog | 4.3 | 4.0 | 2.3 | 2.7 | 1.7 | 1.5 | 2.1 | 4.0 | 4.7 | 3.9 | 4.8 | 4.9 | 40.9 |