Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 778 | 701 | 798 | 773 | 797 | 771 |
| Tmin | 782 | 710 | 795 | 774 | 797 | 775 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 147 | 135 | 156 | 151 | 155 | 150 |
| Humidité/Visibilité | 130 | 117 | 138 | 134 | 135 | 136 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 795 | 788 | 764 | 789 | 771 | 777 |
| Tmin | 792 | 789 | 765 | 788 | 766 | 778 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 155 | 163 | 154 | 153 | 150 | 156 |
| Humidité/Visibilité | 130 | 128 | 134 | 134 | 134 | 123 |
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. |
