Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 486 | 449 | 495 | 491 | 519 | 501 |
| Tmin | 486 | 446 | 493 | 492 | 521 | 502 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 64 | 59 | 62 | 76 | 92 | 92 |
| Humidité/Visibilité | 48 | 53 | 59 | 72 | 88 | 83 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 520 | 512 | 505 | 521 | 506 | 513 |
| Tmin | 517 | 509 | 505 | 518 | 505 | 524 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 97 | 87 | 90 | 90 | 90 | 94 |
| Humidité/Visibilité | 87 | 77 | 84 | 80 | 79 | 83 |
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. |
