Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 803 | 728 | 806 | 779 | 804 | 780 |
| Tmin | 806 | 727 | 805 | 779 | 806 | 780 |
| Durée d’insolation | 341 | 308 | 371 | 388 | 434 | 418 |
| Précipitation | 155 | 141 | 155 | 151 | 155 | 150 |
| Humidité/Visibilité | 154 | 139 | 154 | 149 | 153 | 149 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 800 | 803 | 780 | 797 | 778 | 802 |
| Tmin | 800 | 806 | 779 | 800 | 778 | 804 |
| Durée d’insolation | 396 | 372 | 357 | 362 | 329 | 339 |
| Précipitation | 152 | 157 | 150 | 152 | 150 | 155 |
| Humidité/Visibilité | 150 | 153 | 149 | 148 | 148 | 153 |
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. |
