Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 687 | 626 | 709 | 672 | 700 | 669 |
| Tmin | 572 | 526 | 582 | 562 | 577 | 558 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 206 | 184 | 207 | 200 | 207 | 201 |
| Humidité/Visibilité | 110 | 113 | 130 | 121 | 122 | 111 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 673 | 711 | 702 | 729 | 662 | 680 |
| Tmin | 576 | 582 | 562 | 579 | 540 | 560 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 211 | 211 | 226 | 227 | 201 | 212 |
| Humidité/Visibilité | 103 | 127 | 142 | 146 | 121 | 111 |
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. |
