Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1136 | 1033 | 1143 | 1119 | 1174 | 1137 |
| Tmin | 1143 | 1037 | 1147 | 1124 | 1177 | 1138 |
| Durée d’insolation | 73 | 65 | 77 | 93 | 111 | 110 |
| Précipitation | 94 | 88 | 92 | 108 | 127 | 122 |
| Humidité/Visibilité | 91 | 82 | 91 | 102 | 121 | 118 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1172 | 1170 | 1126 | 1161 | 1131 | 1174 |
| Tmin | 1172 | 1178 | 1140 | 1171 | 1137 | 1178 |
| Durée d’insolation | 109 | 90 | 84 | 90 | 93 | 105 |
| Précipitation | 127 | 125 | 120 | 123 | 121 | 125 |
| Humidité/Visibilité | 120 | 120 | 118 | 116 | 113 | 121 |
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. |
