Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 173 | 155 | 159 | 135 | 152 | 149 |
| Tmin | 170 | 154 | 171 | 172 | 176 | 168 |
| Durée d’insolation | 170 | 154 | 171 | 166 | 168 | 163 |
| Précipitation | 186 | 167 | 185 | 181 | 186 | 180 |
| Humidité/Visibilité | 126 | 113 | 117 | 106 | 114 | 109 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 133 | 137 | 138 | 146 | 193 | 183 |
| Tmin | 162 | 167 | 188 | 193 | 162 | 162 |
| Durée d’insolation | 158 | 166 | 182 | 185 | 158 | 158 |
| Précipitation | 185 | 188 | 208 | 214 | 210 | 219 |
| Humidité/Visibilité | 98 | 100 | 109 | 120 | 138 | 137 |
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. |
