Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 718 | 668 | 739 | 710 | 734 | 711 |
| Tmin | 726 | 670 | 739 | 715 | 737 | 709 |
| Durée d’insolation | 182 | 164 | 176 | 174 | 180 | 168 |
| Précipitation | 188 | 168 | 186 | 183 | 190 | 184 |
| Humidité/Visibilité | 175 | 159 | 173 | 168 | 174 | 166 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 736 | 738 | 745 | 764 | 742 | 770 |
| Tmin | 738 | 740 | 737 | 756 | 743 | 772 |
| Durée d’insolation | 183 | 183 | 198 | 207 | 199 | 209 |
| Précipitation | 186 | 190 | 218 | 219 | 210 | 217 |
| Humidité/Visibilité | 174 | 173 | 188 | 192 | 192 | 207 |
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. |
