Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1138 | 1029 | 1138 | 1119 | 1161 | 1103 |
| Tmin | 1092 | 985 | 1088 | 1054 | 1088 | 1055 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 70 | 60 | 69 | 81 | 96 | 94 |
| Humidité/Visibilité | 52 | 52 | 53 | 68 | 79 | 79 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1141 | 1142 | 1099 | 1131 | 1097 | 1141 |
| Tmin | 1087 | 1091 | 1050 | 1085 | 1050 | 1085 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 101 | 100 | 93 | 95 | 101 | 105 |
| Humidité/Visibilité | 85 | 84 | 78 | 74 | 72 | 54 |
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. |
