Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 339 | 306 | 338 | 328 | 346 | 342 |
| Tmin | 331 | 296 | 330 | 336 | 352 | 333 |
| Durée d’insolation | 186 | 170 | 248 | 210 | 279 | 270 |
| Précipitation | 93 | 87 | 95 | 111 | 124 | 124 |
| Humidité/Visibilité | 92 | 83 | 91 | 104 | 122 | 118 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 354 | 345 | 331 | 362 | 358 | 366 |
| Tmin | 341 | 332 | 322 | 357 | 348 | 371 |
| Durée d’insolation | 310 | 279 | 270 | 217 | 240 | 279 |
| Précipitation | 127 | 129 | 122 | 124 | 120 | 124 |
| Humidité/Visibilité | 122 | 122 | 117 | 116 | 118 | 124 |
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. |
