Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 82 | 71 | 76 | 93 | 101 | 110 |
| Tmin | 79 | 72 | 79 | 101 | 118 | 111 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 103 | 100 | 106 | 117 | 129 | 131 |
| Humidité/Visibilité | 63 | 54 | 61 | 75 | 83 | 82 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 89 | 110 | 104 | 105 | 97 | 106 |
| Tmin | 114 | 117 | 112 | 112 | 105 | 118 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 138 | 132 | 129 | 129 | 130 | 152 |
| Humidité/Visibilité | 81 | 86 | 82 | 83 | 78 | 80 |
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. |
