Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1088 | 1004 | 1106 | 1089 | 1139 | 1103 |
| Tmin | 1095 | 1006 | 1111 | 1093 | 1147 | 1107 |
| Durée d’insolation | 248 | 197 | 186 | 210 | 248 | 270 |
| Précipitation | 126 | 112 | 128 | 145 | 155 | 149 |
| Humidité/Visibilité | 122 | 109 | 118 | 133 | 151 | 147 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1139 | 1135 | 1097 | 1131 | 1106 | 1127 |
| Tmin | 1143 | 1141 | 1098 | 1133 | 1104 | 1136 |
| Durée d’insolation | 279 | 279 | 240 | 310 | 240 | 279 |
| Précipitation | 157 | 167 | 156 | 161 | 158 | 171 |
| Humidité/Visibilité | 150 | 148 | 147 | 144 | 146 | 140 |
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. |
