Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 57 | 50 | 55 | 83 | 84 | 85 |
| Tmin | 60 | 51 | 56 | 81 | 85 | 86 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 99 | 92 | 95 | 126 | 128 | 126 |
| Humidité/Visibilité | 42 | 37 | 42 | 60 | 63 | 61 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 83 | 83 | 81 | 79 | 69 | 75 |
| Tmin | 84 | 87 | 82 | 82 | 68 | 83 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 133 | 132 | 126 | 124 | 135 | 139 |
| Humidité/Visibilité | 60 | 63 | 61 | 58 | 53 | 59 |
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. |
