Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 823 | 743 | 829 | 794 | 826 | 801 |
| Tmin | 816 | 742 | 821 | 795 | 824 | 802 |
| Durée d’insolation | 81 | 57 | 86 | 79 | 58 | 75 |
| Précipitation | 661 | 602 | 658 | 645 | 655 | 634 |
| Humidité/Visibilité | 157 | 146 | 166 | 155 | 164 | 158 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 819 | 822 | 815 | 840 | 809 | 841 |
| Tmin | 827 | 829 | 816 | 844 | 821 | 848 |
| Durée d’insolation | 87 | 87 | 76 | 81 | 104 | 112 |
| Précipitation | 653 | 677 | 670 | 685 | 688 | 245 |
| Humidité/Visibilité | 161 | 158 | 177 | 175 | 166 | 169 |
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. |
