Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 744 | 670 | 743 | 719 | 743 | 717 |
| Tmin | 739 | 669 | 740 | 720 | 743 | 720 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 124 | 114 | 125 | 121 | 126 | 120 |
| Humidité/Visibilité | 120 | 109 | 120 | 115 | 117 | 115 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 741 | 742 | 716 | 738 | 716 | 744 |
| Tmin | 738 | 741 | 714 | 729 | 707 | 741 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 130 | 126 | 120 | 123 | 122 | 126 |
| Humidité/Visibilité | 117 | 115 | 113 | 112 | 110 | 119 |
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. |
