Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 600 | 554 | 618 | 597 | 613 | 576 |
| Tmin | 601 | 554 | 619 | 596 | 613 | 575 |
| Durée d’insolation | 185 | 166 | 184 | 174 | 184 | 177 |
| Précipitation | 186 | 171 | 187 | 181 | 188 | 180 |
| Humidité/Visibilité | 183 | 166 | 184 | 178 | 184 | 178 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 601 | 618 | 617 | 642 | 625 | 650 |
| Tmin | 600 | 621 | 618 | 644 | 626 | 651 |
| Durée d’insolation | 178 | 184 | 202 | 206 | 204 | 217 |
| Précipitation | 186 | 190 | 209 | 217 | 211 | 220 |
| Humidité/Visibilité | 179 | 185 | 205 | 209 | 205 | 213 |
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. |
