Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 706 | 644 | 707 | 685 | 707 | 681 |
| Tmin | 707 | 644 | 708 | 684 | 703 | 680 |
| Durée d’insolation | 357 | 359 | 262 | 345 | 288 | 342 |
| Précipitation | 155 | 143 | 159 | 153 | 157 | 151 |
| Humidité/Visibilité | 151 | 138 | 149 | 144 | 147 | 141 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 710 | 709 | 711 | 737 | 711 | 740 |
| Tmin | 700 | 709 | 712 | 732 | 719 | 739 |
| Durée d’insolation | 355 | 362 | 436 | 414 | 381 | 421 |
| Précipitation | 158 | 159 | 183 | 184 | 182 | 186 |
| Humidité/Visibilité | 148 | 150 | 170 | 169 | 173 | 179 |
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. |
