Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 706 | 633 | 702 | 677 | 699 | 693 |
| Tmin | 710 | 641 | 713 | 689 | 710 | 697 |
| Durée d’insolation | 217 | 197 | 248 | 180 | 186 | 240 |
| Précipitation | 93 | 89 | 97 | 95 | 95 | 105 |
| Humidité/Visibilité | 89 | 78 | 88 | 85 | 88 | 98 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 727 | 737 | 708 | 734 | 716 | 735 |
| Tmin | 742 | 744 | 720 | 740 | 718 | 741 |
| Durée d’insolation | 186 | 217 | 180 | 248 | 210 | 186 |
| Précipitation | 126 | 126 | 120 | 123 | 126 | 125 |
| Humidité/Visibilité | 118 | 119 | 115 | 114 | 116 | 120 |
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. |
