Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 802 | 727 | 803 | 778 | 804 | 778 |
| Tmin | 805 | 724 | 802 | 778 | 805 | 779 |
| Durée d’insolation | 185 | 160 | 177 | 174 | 182 | 175 |
| Précipitation | 812 | 729 | 807 | 781 | 806 | 780 |
| Humidité/Visibilité | 183 | 167 | 183 | 177 | 184 | 179 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 800 | 805 | 806 | 824 | 799 | 835 |
| Tmin | 800 | 807 | 809 | 831 | 808 | 837 |
| Durée d’insolation | 179 | 187 | 208 | 202 | 205 | 215 |
| Précipitation | 804 | 810 | 810 | 835 | 812 | 226 |
| Humidité/Visibilité | 180 | 185 | 205 | 207 | 204 | 213 |
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. |
