Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 574 | 511 | 576 | 549 | 576 | 576 |
| Tmin | 582 | 522 | 566 | 549 | 576 | 587 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 561 | 512 | 571 | 559 | 586 | 578 |
| Humidité/Visibilité | 82 | 78 | 82 | 73 | 84 | 107 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 592 | 577 | 560 | 597 | 572 | 595 |
| Tmin | 602 | 583 | 564 | 587 | 573 | 601 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 604 | 613 | 594 | 595 | 582 | 600 |
| Humidité/Visibilité | 108 | 94 | 96 | 100 | 100 | 108 |
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. |
