Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 543 | 484 | 535 | 518 | 545 | 510 |
| Tmin | 498 | 449 | 497 | 480 | 497 | 481 |
| Durée d’insolation | 31 | 28 | 62 | 60 | 62 | 60 |
| Précipitation | 65 | 66 | 73 | 94 | 105 | 95 |
| Humidité/Visibilité | 44 | 34 | 40 | 38 | 50 | 47 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 534 | 546 | 517 | 546 | 524 | 543 |
| Tmin | 496 | 496 | 480 | 496 | 480 | 496 |
| Durée d’insolation | 62 | 62 | 30 | 124 | 60 | 62 |
| Précipitation | 110 | 108 | 99 | 93 | 94 | 108 |
| Humidité/Visibilité | 58 | 74 | 51 | 69 | 58 | 62 |
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. |
