Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 185 | 164 | 177 | 178 | 185 | 177 |
| Tmin | 173 | 164 | 182 | 179 | 183 | 178 |
| Durée d’insolation | 264 | 243 | 270 | 298 | 306 | 298 |
| Précipitation | 186 | 168 | 188 | 181 | 186 | 182 |
| Humidité/Visibilité | 178 | 166 | 183 | 179 | 184 | 177 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 183 | 183 | 204 | 210 | 207 | 218 |
| Tmin | 186 | 184 | 204 | 208 | 204 | 215 |
| Durée d’insolation | 310 | 307 | 325 | 325 | 323 | 339 |
| Précipitation | 186 | 192 | 214 | 215 | 210 | 223 |
| Humidité/Visibilité | 184 | 182 | 204 | 208 | 206 | 214 |
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. |
