Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1187 | 1104 | 1202 | 1170 | 1212 | 1158 |
| Tmin | 1168 | 1092 | 1185 | 1155 | 1193 | 1139 |
| Durée d’insolation | 271 | 244 | 267 | 266 | 305 | 327 |
| Précipitation | 774 | 700 | 775 | 750 | 774 | 750 |
| Humidité/Visibilité | 167 | 150 | 165 | 156 | 167 | 164 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1198 | 1218 | 1184 | 1212 | 1149 | 1164 |
| Tmin | 1184 | 1197 | 1166 | 1195 | 1150 | 1170 |
| Durée d’insolation | 336 | 378 | 357 | 409 | 342 | 359 |
| Précipitation | 777 | 779 | 775 | 804 | 777 | 807 |
| Humidité/Visibilité | 168 | 170 | 186 | 197 | 194 | 207 |
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. |
