Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1123 | 1037 | 1147 | 1118 | 1173 | 1136 |
| Tmin | 1122 | 1038 | 1145 | 1119 | 1172 | 1137 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 664 | 603 | 660 | 651 | 688 | 667 |
| Humidité/Visibilité | 88 | 80 | 88 | 96 | 114 | 113 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1175 | 1161 | 1123 | 1165 | 1131 | 1173 |
| Tmin | 1170 | 1167 | 1126 | 1170 | 1134 | 1175 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 687 | 695 | 664 | 684 | 664 | 136 |
| Humidité/Visibilité | 118 | 110 | 112 | 111 | 111 | 118 |
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. |
