Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 524 | 460 | 520 | 490 | 524 | 495 |
| Tmin | 527 | 469 | 525 | 502 | 525 | 508 |
| Durée d’insolation | 183 | 160 | 184 | 157 | 169 | 168 |
| Précipitation | 312 | 286 | 310 | 310 | 310 | 300 |
| Humidité/Visibilité | 183 | 157 | 181 | 168 | 183 | 171 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 525 | 522 | 536 | 550 | 528 | 554 |
| Tmin | 523 | 523 | 533 | 549 | 533 | 557 |
| Durée d’insolation | 171 | 161 | 188 | 196 | 199 | 208 |
| Précipitation | 312 | 318 | 332 | 341 | 340 | 219 |
| Humidité/Visibilité | 183 | 182 | 204 | 208 | 200 | 212 |
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. |
