Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1261 | 1144 | 1266 | 1218 | 1259 | 1221 |
| Tmin | 1258 | 1146 | 1265 | 1223 | 1265 | 1226 |
| Durée d’insolation | 336 | 328 | 335 | 348 | 394 | 356 |
| Précipitation | 188 | 170 | 191 | 183 | 186 | 182 |
| Humidité/Visibilité | 183 | 167 | 182 | 173 | 183 | 176 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1258 | 1256 | 1241 | 1284 | 1252 | 1288 |
| Tmin | 1267 | 1267 | 1249 | 1293 | 1253 | 1292 |
| Durée d’insolation | 367 | 368 | 383 | 396 | 353 | 395 |
| Précipitation | 188 | 194 | 216 | 219 | 212 | 223 |
| Humidité/Visibilité | 182 | 181 | 200 | 206 | 205 | 211 |
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. |
