Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 679 | 615 | 679 | 651 | 677 | 670 |
| Tmin | 681 | 617 | 681 | 659 | 681 | 671 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 62 | 59 | 62 | 63 | 63 | 73 |
| Humidité/Visibilité | 61 | 55 | 61 | 56 | 60 | 71 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 706 | 707 | 689 | 706 | 686 | 713 |
| Tmin | 708 | 708 | 685 | 702 | 685 | 706 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 96 | 93 | 94 | 93 | 93 | 105 |
| Humidité/Visibilité | 90 | 90 | 86 | 83 | 86 | 89 |
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. |
