Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1254 | 1139 | 1256 | 1224 | 1254 | 1196 |
| Tmin | 1226 | 1112 | 1229 | 1197 | 1232 | 1175 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 181 | 167 | 185 | 180 | 184 | 173 |
| Humidité/Visibilité | 155 | 136 | 153 | 149 | 154 | 146 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1230 | 1226 | 1207 | 1259 | 1220 | 1232 |
| Tmin | 1200 | 1203 | 1193 | 1228 | 1193 | 1236 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 186 | 185 | 202 | 205 | 198 | 183 |
| Humidité/Visibilité | 150 | 154 | 171 | 161 | 166 | 160 |
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. |
