Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 105 | 80 | 87 | 141 | 133 | 112 |
| Tmin | 103 | 81 | 86 | 133 | 131 | 111 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 133 | 112 | 126 | 151 | 156 | 153 |
| Humidité/Visibilité | 108 | 83 | 87 | 140 | 136 | 115 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 120 | 142 | 140 | 136 | 135 | 152 |
| Tmin | 117 | 148 | 135 | 142 | 140 | 147 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 158 | 158 | 158 | 152 | 156 | 160 |
| Humidité/Visibilité | 118 | 147 | 142 | 145 | 142 | 151 |
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. |
