Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 177 | 162 | 177 | 177 | 181 | 190 |
| Tmin | 306 | 278 | 305 | 294 | 308 | 310 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 101 | 93 | 97 | 105 | 98 | 107 |
| Humidité/Visibilité | 65 | 61 | 65 | 64 | 67 | 74 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 202 | 211 | 176 | 179 | 167 | 179 |
| Tmin | 333 | 340 | 326 | 334 | 313 | 336 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 130 | 128 | 125 | 124 | 127 | 137 |
| Humidité/Visibilité | 86 | 88 | 86 | 84 | 80 | 85 |
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. |
