Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 144 | 142 | 165 | 159 | 144 | 138 |
| Tmin | 147 | 136 | 163 | 159 | 150 | 147 |
| Durée d’insolation | 76 | 77 | 92 | 93 | 81 | 84 |
| Précipitation | 140 | 132 | 143 | 145 | 145 | 139 |
| Humidité/Visibilité | 64 | 65 | 78 | 77 | 68 | 65 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 147 | 151 | 143 | 160 | 152 | 152 |
| Tmin | 146 | 152 | 140 | 139 | 135 | 147 |
| Durée d’insolation | 75 | 82 | 74 | 71 | 72 | 74 |
| Précipitation | 133 | 148 | 136 | 148 | 150 | 171 |
| Humidité/Visibilité | 71 | 68 | 63 | 67 | 67 | 68 |
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. |
