Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1135 | 1028 | 1136 | 1096 | 1131 | 1097 |
| Tmin | 1133 | 1030 | 1140 | 1101 | 1136 | 1098 |
| Durée d’insolation | 248 | 226 | 186 | 180 | 217 | 240 |
| Précipitation | 155 | 141 | 157 | 153 | 157 | 150 |
| Humidité/Visibilité | 154 | 139 | 153 | 148 | 153 | 148 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1135 | 1117 | 1106 | 1163 | 1132 | 1161 |
| Tmin | 1135 | 1121 | 1104 | 1163 | 1130 | 1164 |
| Durée d’insolation | 217 | 279 | 270 | 248 | 180 | 186 |
| Précipitation | 158 | 160 | 180 | 184 | 180 | 186 |
| Humidité/Visibilité | 152 | 154 | 176 | 178 | 176 | 185 |
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. |
