Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 132 | 108 | 136 | 141 | 147 | 126 |
| Tmin | 137 | 123 | 144 | 146 | 149 | 141 |
| Durée d’insolation | 131 | 119 | 133 | 124 | 135 | 131 |
| Précipitation | 165 | 142 | 165 | 157 | 162 | 152 |
| Humidité/Visibilité | 142 | 125 | 138 | 133 | 123 | 114 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 133 | 162 | 160 | 154 | 147 | 131 |
| Tmin | 142 | 154 | 159 | 154 | 152 | 126 |
| Durée d’insolation | 137 | 148 | 151 | 141 | 116 | 119 |
| Précipitation | 162 | 201 | 191 | 194 | 202 | 198 |
| Humidité/Visibilité | 118 | 128 | 133 | 156 | 139 | 132 |
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. |
