Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1551 | 1425 | 1581 | 1529 | 1573 | 1526 |
| Tmin | 1555 | 1428 | 1580 | 1529 | 1574 | 1528 |
| Durée d’insolation | 217 | 225 | 279 | 270 | 279 | 300 |
| Précipitation | 187 | 170 | 187 | 183 | 188 | 180 |
| Humidité/Visibilité | 176 | 165 | 185 | 179 | 184 | 179 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1571 | 1572 | 1558 | 1601 | 1552 | 1572 |
| Tmin | 1572 | 1571 | 1558 | 1603 | 1558 | 1581 |
| Durée d’insolation | 310 | 310 | 300 | 310 | 270 | 279 |
| Précipitation | 184 | 192 | 212 | 216 | 213 | 200 |
| Humidité/Visibilité | 177 | 174 | 206 | 207 | 203 | 183 |
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. |
