Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 698 | 624 | 683 | 673 | 695 | 676 |
| Tmin | 695 | 628 | 678 | 671 | 697 | 679 |
| Durée d’insolation | 136 | 120 | 119 | 128 | 136 | 138 |
| Précipitation | 629 | 568 | 631 | 613 | 619 | 604 |
| Humidité/Visibilité | 140 | 122 | 120 | 129 | 132 | 133 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 701 | 720 | 708 | 709 | 675 | 694 |
| Tmin | 700 | 724 | 723 | 709 | 690 | 696 |
| Durée d’insolation | 141 | 163 | 179 | 145 | 143 | 135 |
| Précipitation | 624 | 663 | 666 | 686 | 623 | 174 |
| Humidité/Visibilité | 144 | 160 | 175 | 159 | 143 | 137 |
Climate data is usually derived from meteorological data of a certain number of years. The actual number of recorded years may vary from only a couple to 50 years or more. The quality of climate data depends on the number of available recorded years. Fewer years means less reliable data. The standart-period for reliable climate data is 30 years. For example, the mean monthly temperature for, let's say January, would ideally calculated from a total number of 930 recorded January-days. However, the usual number of recorded days is much smaller. The table above shows the actual number of recorded days for every parameter measured. |
