Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 110 | 78 | 87 | 86 | 88 | 84 |
| Tmin | 114 | 92 | 86 | 85 | 86 | 84 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 125 | 105 | 120 | 145 | 153 | 148 |
| Humidité/Visibilité | 114 | 96 | 111 | 124 | 140 | 137 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 86 | 84 | 86 | 82 | 85 | 88 |
| Tmin | 86 | 87 | 83 | 82 | 84 | 84 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 144 | 147 | 151 | 140 | 123 | 126 |
| Humidité/Visibilité | 139 | 140 | 138 | 127 | 115 | 123 |
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. |
