Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 87 | 81 | 77 | 100 | 73 | 84 |
| Tmin | 79 | 75 | 74 | 108 | 92 | 83 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 125 | 113 | 126 | 147 | 155 | 151 |
| Humidité/Visibilité | 87 | 82 | 77 | 110 | 92 | 86 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 84 | 90 | 88 | 82 | 82 | 89 |
| Tmin | 83 | 87 | 83 | 82 | 80 | 86 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 156 | 158 | 150 | 153 | 150 | 157 |
| Humidité/Visibilité | 88 | 89 | 86 | 85 | 86 | 89 |
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. |
