Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1115 | 1008 | 1116 | 1077 | 1116 | 1091 |
| Tmin | 1116 | 1008 | 1114 | 1077 | 1112 | 1088 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 64 | 58 | 63 | 62 | 63 | 73 |
| Humidité/Visibilité | 60 | 56 | 61 | 57 | 61 | 71 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1143 | 1146 | 1106 | 1140 | 1108 | 1145 |
| Tmin | 1139 | 1136 | 1103 | 1141 | 1109 | 1143 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 96 | 97 | 92 | 92 | 90 | 95 |
| Humidité/Visibilité | 91 | 89 | 87 | 85 | 87 | 91 |
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. |
