Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 824 | 745 | 829 | 799 | 821 | 790 |
| Tmin | 826 | 749 | 805 | 768 | 800 | 768 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 805 | 731 | 807 | 781 | 807 | 780 |
| Humidité/Visibilité | 149 | 132 | 153 | 138 | 147 | 132 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 817 | 818 | 827 | 847 | 829 | 829 |
| Tmin | 800 | 790 | 801 | 824 | 800 | 828 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 808 | 809 | 810 | 830 | 811 | 192 |
| Humidité/Visibilité | 148 | 148 | 174 | 163 | 162 | 163 |
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. |
