Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 342 | 288 | 328 | 323 | 332 | 312 |
| Tmin | 343 | 299 | 330 | 325 | 336 | 325 |
| Durée d’insolation | 52 | 40 | 45 | 49 | 55 | 45 |
| Précipitation | 134 | 119 | 123 | 120 | 129 | 122 |
| Humidité/Visibilité | 102 | 93 | 108 | 101 | 110 | 104 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 332 | 326 | 327 | 330 | 327 | 337 |
| Tmin | 330 | 327 | 325 | 331 | 323 | 339 |
| Durée d’insolation | 43 | 44 | 42 | 46 | 26 | 36 |
| Précipitation | 126 | 161 | 155 | 152 | 121 | 132 |
| Humidité/Visibilité | 111 | 124 | 131 | 124 | 97 | 110 |
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. |
