Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 2160 | 1953 | 2159 | 2092 | 2155 | 2086 |
| Tmin | 2167 | 1960 | 2167 | 2091 | 2154 | 2093 |
| Durée d’insolation | 124 | 113 | 93 | 90 | 155 | 180 |
| Précipitation | 186 | 169 | 187 | 181 | 186 | 180 |
| Humidité/Visibilité | 185 | 166 | 184 | 177 | 182 | 178 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 2160 | 2159 | 2119 | 2185 | 2122 | 2203 |
| Tmin | 2165 | 2161 | 2125 | 2187 | 2129 | 2208 |
| Durée d’insolation | 186 | 155 | 150 | 155 | 120 | 124 |
| Précipitation | 188 | 190 | 210 | 215 | 210 | 217 |
| Humidité/Visibilité | 182 | 183 | 204 | 207 | 201 | 215 |
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. |
