Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1171 | 1065 | 1186 | 1169 | 1216 | 1176 |
| Tmin | 1177 | 1072 | 1194 | 1173 | 1221 | 1182 |
| Durée d’insolation | 83 | 76 | 86 | 80 | 80 | 81 |
| Précipitation | 598 | 537 | 594 | 598 | 621 | 605 |
| Humidité/Visibilité | 110 | 93 | 105 | 121 | 135 | 130 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1210 | 1205 | 1171 | 1209 | 1161 | 1203 |
| Tmin | 1208 | 1202 | 1173 | 1214 | 1167 | 1204 |
| Durée d’insolation | 79 | 72 | 80 | 78 | 106 | 114 |
| Précipitation | 623 | 622 | 608 | 618 | 584 | 130 |
| Humidité/Visibilité | 131 | 126 | 132 | 129 | 113 | 122 |
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. |
