Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 450 | 449 | 496 | 476 | 469 | 479 |
| Tmin | 451 | 448 | 496 | 480 | 473 | 479 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 66 | 58 | 64 | 62 | 62 | 63 |
| Humidité/Visibilité | 61 | 54 | 61 | 59 | 56 | 57 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 495 | 495 | 477 | 515 | 506 | 517 |
| Tmin | 496 | 494 | 477 | 516 | 506 | 527 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 64 | 69 | 64 | 96 | 93 | 96 |
| Humidité/Visibilité | 60 | 60 | 62 | 84 | 86 | 90 |
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. |
