Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1228 | 1138 | 1261 | 1225 | 1233 | 1223 |
| Tmin | 1079 | 1001 | 1111 | 1077 | 1077 | 1067 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 186 | 169 | 187 | 183 | 186 | 180 |
| Humidité/Visibilité | 167 | 154 | 166 | 164 | 171 | 165 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1263 | 1261 | 1222 | 1279 | 1223 | 1257 |
| Tmin | 1109 | 1113 | 1053 | 1107 | 1059 | 1085 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 188 | 191 | 208 | 205 | 181 | 190 |
| Humidité/Visibilité | 167 | 171 | 189 | 184 | 174 | 178 |
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. |
