Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 712 | 643 | 713 | 699 | 738 | 715 |
| Tmin | 710 | 643 | 710 | 699 | 737 | 717 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 635 | 573 | 631 | 621 | 656 | 638 |
| Humidité/Visibilité | 88 | 80 | 87 | 95 | 114 | 113 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 738 | 726 | 709 | 734 | 713 | 744 |
| Tmin | 736 | 735 | 710 | 737 | 713 | 741 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 656 | 666 | 632 | 653 | 635 | 656 |
| Humidité/Visibilité | 119 | 110 | 111 | 113 | 112 | 122 |
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. |
