Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 88 | 81 | 89 | 103 | 121 | 117 |
| Tmin | 87 | 83 | 90 | 97 | 115 | 115 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 96 | 86 | 96 | 110 | 127 | 121 |
| Humidité/Visibilité | 90 | 84 | 91 | 104 | 119 | 117 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 117 | 111 | 118 | 115 | 117 | 113 |
| Tmin | 114 | 109 | 114 | 117 | 116 | 122 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 127 | 126 | 121 | 125 | 120 | 129 |
| Humidité/Visibilité | 118 | 110 | 117 | 116 | 118 | 121 |
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. |
