Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 796 | 706 | 785 | 758 | 769 | 749 |
| Tmin | 789 | 713 | 795 | 769 | 773 | 749 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 771 | 703 | 774 | 748 | 773 | 749 |
| Humidité/Visibilité | 138 | 133 | 141 | 135 | 130 | 130 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 770 | 785 | 792 | 816 | 788 | 804 |
| Tmin | 763 | 784 | 792 | 819 | 796 | 813 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 778 | 779 | 780 | 805 | 780 | 802 |
| Humidité/Visibilité | 140 | 143 | 157 | 161 | 151 | 165 |
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. |
