Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 684 | 615 | 686 | 662 | 688 | 672 |
| Tmin | 685 | 616 | 684 | 664 | 690 | 670 |
| Durée d’insolation | 186 | 226 | 186 | 270 | 186 | 270 |
| Précipitation | 93 | 85 | 95 | 108 | 124 | 120 |
| Humidité/Visibilité | 92 | 84 | 92 | 104 | 123 | 119 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 692 | 686 | 666 | 708 | 700 | 714 |
| Tmin | 693 | 686 | 668 | 709 | 699 | 716 |
| Durée d’insolation | 279 | 279 | 270 | 248 | 240 | 217 |
| Précipitation | 127 | 129 | 120 | 122 | 120 | 124 |
| Humidité/Visibilité | 123 | 121 | 118 | 117 | 118 | 124 |
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. |
