Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1256 | 1147 | 1269 | 1229 | 1268 | 1229 |
| Tmin | 1259 | 1149 | 1267 | 1229 | 1270 | 1225 |
| Durée d’insolation | 248 | 225 | 248 | 240 | 310 | 300 |
| Précipitation | 186 | 169 | 187 | 181 | 186 | 180 |
| Humidité/Visibilité | 185 | 167 | 185 | 179 | 183 | 179 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1264 | 1268 | 1257 | 1293 | 1256 | 1300 |
| Tmin | 1269 | 1272 | 1255 | 1295 | 1257 | 1300 |
| Durée d’insolation | 279 | 310 | 240 | 279 | 240 | 279 |
| Précipitation | 186 | 189 | 211 | 214 | 210 | 217 |
| Humidité/Visibilité | 184 | 185 | 206 | 210 | 207 | 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. |
