Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 107 | 102 | 94 | 81 | 88 | 85 |
| Tmin | 101 | 92 | 80 | 80 | 82 | 77 |
| Durée d’insolation | 79 | 70 | 59 | 51 | 59 | 49 |
| Précipitation | 125 | 117 | 129 | 121 | 125 | 120 |
| Humidité/Visibilité | 88 | 82 | 98 | 91 | 94 | 84 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 87 | 106 | 105 | 101 | 100 | 78 |
| Tmin | 81 | 99 | 94 | 91 | 90 | 75 |
| Durée d’insolation | 43 | 64 | 64 | 59 | 43 | 37 |
| Précipitation | 128 | 159 | 152 | 150 | 149 | 131 |
| Humidité/Visibilité | 87 | 98 | 99 | 106 | 100 | 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. |
