Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1114 | 1003 | 1116 | 1077 | 1115 | 1080 |
| Tmin | 1116 | 1003 | 1116 | 1076 | 1114 | 1077 |
| Durée d’insolation | 0 | 0 | 0 | 1 | 0 | 0 |
| Précipitation | 186 | 168 | 186 | 181 | 186 | 181 |
| Humidité/Visibilité | 184 | 165 | 185 | 178 | 184 | 179 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1114 | 1114 | 1106 | 1139 | 1106 | 1146 |
| Tmin | 1115 | 1118 | 1107 | 1137 | 1107 | 1147 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 17 | 31 |
| Précipitation | 186 | 190 | 212 | 215 | 212 | 217 |
| Humidité/Visibilité | 184 | 185 | 206 | 209 | 206 | 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. |
