Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 119 | 107 | 122 | 143 | 149 | 145 |
| Tmin | 123 | 108 | 120 | 140 | 148 | 146 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 124 | 112 | 124 | 146 | 155 | 148 |
| Humidité/Visibilité | 122 | 109 | 121 | 142 | 152 | 147 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 153 | 151 | 149 | 144 | 146 | 151 |
| Tmin | 153 | 154 | 145 | 144 | 147 | 152 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 156 | 156 | 153 | 154 | 151 | 155 |
| Humidité/Visibilité | 153 | 152 | 147 | 147 | 148 | 153 |
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. |
