Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 184 | 168 | 185 | 179 | 184 | 180 |
| Tmin | 186 | 167 | 186 | 179 | 186 | 179 |
| Durée d’insolation | 371 | 336 | 403 | 418 | 465 | 447 |
| Précipitation | 186 | 169 | 186 | 183 | 186 | 180 |
| Humidité/Visibilité | 184 | 168 | 185 | 178 | 184 | 179 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 181 | 185 | 208 | 210 | 206 | 216 |
| Tmin | 180 | 187 | 209 | 212 | 205 | 215 |
| Durée d’insolation | 426 | 401 | 418 | 425 | 353 | 401 |
| Précipitation | 184 | 190 | 210 | 214 | 209 | 216 |
| Humidité/Visibilité | 181 | 185 | 206 | 210 | 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. |
