Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 493 | 447 | 495 | 465 | 486 | 477 |
| Tmin | 489 | 441 | 486 | 458 | 481 | 472 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 569 | 502 | 560 | 557 | 584 | 562 |
| Humidité/Visibilité | 52 | 42 | 47 | 42 | 53 | 61 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 491 | 493 | 486 | 521 | 509 | 523 |
| Tmin | 486 | 487 | 475 | 508 | 488 | 507 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 582 | 584 | 583 | 645 | 624 | 165 |
| Humidité/Visibilité | 62 | 66 | 71 | 100 | 101 | 74 |
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. |
