Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 760 | 683 | 763 | 747 | 770 | 751 |
| Tmin | 770 | 693 | 767 | 749 | 771 | 759 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 64 | 59 | 62 | 62 | 67 | 77 |
| Humidité/Visibilité | 55 | 46 | 56 | 55 | 55 | 64 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 796 | 787 | 773 | 797 | 762 | 794 |
| Tmin | 794 | 788 | 768 | 796 | 765 | 802 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 98 | 98 | 104 | 99 | 96 | 99 |
| Humidité/Visibilité | 80 | 71 | 77 | 76 | 68 | 85 |
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. |
