Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1171 | 1072 | 1192 | 1156 | 1198 | 1147 |
| Tmin | 1181 | 1079 | 1200 | 1167 | 1205 | 1150 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 716 | 652 | 709 | 670 | 690 | 661 |
| Humidité/Visibilité | 115 | 102 | 121 | 122 | 124 | 129 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1196 | 1206 | 1169 | 1201 | 1165 | 1186 |
| Tmin | 1195 | 1214 | 1181 | 1206 | 1183 | 1201 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 695 | 720 | 704 | 723 | 702 | 706 |
| Humidité/Visibilité | 117 | 128 | 137 | 155 | 142 | 132 |
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. |
