Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 681 | 621 | 691 | 665 | 686 | 664 |
| Tmin | 676 | 616 | 681 | 664 | 685 | 659 |
| Durée d’insolation | 106 | 158 | 109 | 142 | 170 | 169 |
| Précipitation | 155 | 141 | 154 | 151 | 155 | 150 |
| Humidité/Visibilité | 118 | 111 | 123 | 122 | 122 | 121 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 689 | 683 | 659 | 678 | 657 | 678 |
| Tmin | 679 | 683 | 660 | 668 | 660 | 676 |
| Durée d’insolation | 143 | 143 | 135 | 125 | 143 | 175 |
| Précipitation | 155 | 157 | 150 | 153 | 152 | 129 |
| Humidité/Visibilité | 123 | 122 | 118 | 113 | 115 | 118 |
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. |
