Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 83 | 75 | 78 | 101 | 109 | 113 |
| Tmin | 89 | 81 | 87 | 116 | 122 | 112 |
| Durée d’insolation | 82 | 73 | 80 | 76 | 84 | 81 |
| Précipitation | 101 | 98 | 99 | 129 | 127 | 126 |
| Humidité/Visibilité | 64 | 58 | 63 | 81 | 85 | 83 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 110 | 115 | 114 | 117 | 105 | 113 |
| Tmin | 115 | 119 | 118 | 119 | 110 | 120 |
| Durée d’insolation | 79 | 103 | 108 | 115 | 100 | 107 |
| Précipitation | 135 | 129 | 120 | 126 | 124 | 127 |
| Humidité/Visibilité | 81 | 85 | 86 | 85 | 80 | 86 |
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. |
