Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 90 | 85 | 98 | 115 | 117 | 118 |
| Tmin | 81 | 81 | 95 | 111 | 116 | 94 |
| Durée d’insolation | 79 | 74 | 75 | 101 | 67 | 73 |
| Précipitation | 93 | 85 | 104 | 121 | 124 | 119 |
| Humidité/Visibilité | 78 | 69 | 83 | 101 | 96 | 93 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 120 | 118 | 116 | 113 | 119 | 112 |
| Tmin | 115 | 118 | 116 | 103 | 88 | 108 |
| Durée d’insolation | 108 | 102 | 86 | 79 | 74 | 96 |
| Précipitation | 126 | 126 | 120 | 122 | 120 | 124 |
| Humidité/Visibilité | 105 | 105 | 99 | 89 | 98 | 109 |
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. |
