Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 701 | 630 | 689 | 655 | 677 | 656 |
| Tmin | 702 | 632 | 686 | 654 | 677 | 657 |
| Durée d’insolation | 37 | 51 | 70 | 72 | 85 | 83 |
| Précipitation | 126 | 112 | 124 | 121 | 129 | 122 |
| Humidité/Visibilité | 112 | 100 | 114 | 103 | 110 | 107 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 683 | 706 | 682 | 698 | 677 | 704 |
| Tmin | 684 | 706 | 680 | 696 | 683 | 703 |
| Durée d’insolation | 91 | 115 | 98 | 75 | 37 | 29 |
| Précipitation | 128 | 157 | 158 | 147 | 119 | 127 |
| Humidité/Visibilité | 116 | 136 | 133 | 127 | 109 | 115 |
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. |
