Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 73 | 74 | 79 | 79 | 83 | 101 |
| Tmin | 78 | 70 | 83 | 78 | 81 | 93 |
| Durée d’insolation | 62 | 84 | 31 | 30 | 62 | 60 |
| Précipitation | 100 | 98 | 100 | 104 | 98 | 107 |
| Humidité/Visibilité | 85 | 78 | 87 | 83 | 87 | 99 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 114 | 113 | 109 | 112 | 108 | 102 |
| Tmin | 115 | 114 | 107 | 112 | 106 | 112 |
| Durée d’insolation | 31 | 31 | 0 | 31 | 30 | 62 |
| Précipitation | 130 | 130 | 125 | 125 | 124 | 132 |
| Humidité/Visibilité | 117 | 117 | 115 | 113 | 111 | 117 |
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. |
