Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 833 | 753 | 831 | 807 | 836 | 808 |
| Tmin | 834 | 753 | 834 | 807 | 837 | 807 |
| Durée d’insolation | 31 | 28 | 18 | 42 | 44 | 39 |
| Précipitation | 186 | 169 | 187 | 181 | 186 | 180 |
| Humidité/Visibilité | 184 | 167 | 184 | 178 | 185 | 177 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 833 | 838 | 838 | 855 | 840 | 867 |
| Tmin | 835 | 839 | 838 | 862 | 837 | 869 |
| Durée d’insolation | 33 | 33 | 36 | 38 | 34 | 32 |
| Précipitation | 186 | 190 | 212 | 215 | 210 | 217 |
| Humidité/Visibilité | 184 | 185 | 206 | 207 | 204 | 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. |
