Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 87 | 75 | 79 | 103 | 111 | 114 |
| Tmin | 86 | 76 | 86 | 105 | 110 | 116 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 101 | 96 | 100 | 116 | 133 | 128 |
| Humidité/Visibilité | 66 | 57 | 64 | 77 | 82 | 84 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 102 | 110 | 111 | 112 | 104 | 107 |
| Tmin | 114 | 115 | 115 | 117 | 106 | 115 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 135 | 137 | 127 | 131 | 132 | 134 |
| Humidité/Visibilité | 80 | 84 | 84 | 84 | 80 | 84 |
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. |
