Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 603 | 560 | 617 | 599 | 617 | 595 |
| Tmin | 606 | 561 | 619 | 597 | 617 | 596 |
| Durée d’insolation | 93 | 110 | 128 | 144 | 132 | 131 |
| Précipitation | 188 | 168 | 186 | 181 | 188 | 180 |
| Humidité/Visibilité | 184 | 167 | 185 | 179 | 183 | 176 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 617 | 614 | 624 | 642 | 624 | 652 |
| Tmin | 618 | 618 | 627 | 641 | 626 | 651 |
| Durée d’insolation | 152 | 148 | 148 | 154 | 148 | 154 |
| Précipitation | 188 | 192 | 214 | 217 | 212 | 217 |
| Humidité/Visibilité | 183 | 181 | 205 | 209 | 205 | 214 |
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. |
