Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1249 | 1140 | 1253 | 1220 | 1256 | 1211 |
| Tmin | 1224 | 1118 | 1228 | 1189 | 1228 | 1182 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 806 | 729 | 806 | 780 | 804 | 774 |
| Humidité/Visibilité | 161 | 143 | 155 | 152 | 157 | 152 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1252 | 1254 | 1249 | 1278 | 1241 | 1256 |
| Tmin | 1223 | 1237 | 1217 | 1249 | 1217 | 1257 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 808 | 805 | 808 | 827 | 802 | 184 |
| Humidité/Visibilité | 156 | 161 | 182 | 172 | 172 | 170 |
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. |
