Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 734 | 662 | 733 | 690 | 701 | 667 |
| Tmin | 738 | 670 | 740 | 701 | 706 | 670 |
| Durée d’insolation | 217 | 254 | 248 | 240 | 248 | 300 |
| Précipitation | 200 | 172 | 202 | 185 | 206 | 184 |
| Humidité/Visibilité | 171 | 157 | 169 | 162 | 171 | 167 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 676 | 654 | 648 | 651 | 628 | 631 |
| Tmin | 681 | 654 | 646 | 650 | 627 | 635 |
| Durée d’insolation | 248 | 310 | 270 | 279 | 270 | 279 |
| Précipitation | 186 | 192 | 214 | 220 | 214 | 227 |
| Humidité/Visibilité | 171 | 176 | 194 | 202 | 192 | 204 |
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. |
