Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1233 | 1144 | 1269 | 1229 | 1264 | 1206 |
| Tmin | 1233 | 1142 | 1269 | 1229 | 1265 | 1204 |
| Durée d’insolation | 399 | 363 | 400 | 447 | 495 | 478 |
| Précipitation | 186 | 169 | 189 | 181 | 186 | 182 |
| Humidité/Visibilité | 183 | 167 | 184 | 179 | 184 | 179 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1257 | 1268 | 1247 | 1293 | 1254 | 1300 |
| Tmin | 1257 | 1273 | 1244 | 1295 | 1255 | 1301 |
| Durée d’insolation | 457 | 466 | 473 | 519 | 443 | 463 |
| Précipitation | 184 | 190 | 210 | 215 | 209 | 217 |
| Humidité/Visibilité | 180 | 184 | 205 | 209 | 205 | 215 |
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. |
