Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 325 | 286 | 326 | 325 | 337 | 315 |
| Tmin | 330 | 306 | 335 | 325 | 338 | 332 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 100 | 93 | 101 | 99 | 102 | 111 |
| Humidité/Visibilité | 63 | 56 | 63 | 65 | 66 | 65 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 318 | 334 | 322 | 344 | 343 | 359 |
| Tmin | 354 | 365 | 356 | 360 | 348 | 369 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 130 | 132 | 122 | 126 | 131 | 135 |
| Humidité/Visibilité | 72 | 78 | 78 | 79 | 79 | 85 |
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. |
