Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 137 | 130 | 149 | 144 | 155 | 145 |
| Tmin | 138 | 122 | 142 | 149 | 153 | 144 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 159 | 140 | 155 | 151 | 155 | 150 |
| Humidité/Visibilité | 108 | 93 | 104 | 91 | 93 | 95 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 143 | 162 | 148 | 144 | 141 | 117 |
| Tmin | 149 | 163 | 146 | 143 | 128 | 121 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 160 | 186 | 180 | 184 | 179 | 163 |
| Humidité/Visibilité | 100 | 118 | 118 | 116 | 107 | 100 |
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. |
