Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1172 | 1066 | 1178 | 1149 | 1206 | 1165 |
| Tmin | 1172 | 1066 | 1176 | 1149 | 1201 | 1168 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 105 | 99 | 101 | 109 | 128 | 128 |
| Humidité/Visibilité | 88 | 80 | 88 | 97 | 114 | 114 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1207 | 1192 | 1159 | 1200 | 1161 | 1207 |
| Tmin | 1202 | 1201 | 1161 | 1202 | 1164 | 1209 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 132 | 134 | 123 | 126 | 123 | 126 |
| Humidité/Visibilité | 119 | 112 | 112 | 114 | 113 | 122 |
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. |
