Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1108 | 1004 | 1110 | 1069 | 1108 | 1076 |
| Tmin | 1109 | 1001 | 1108 | 1071 | 1111 | 1079 |
| Durée d’insolation | 155 | 140 | 186 | 180 | 217 | 240 |
| Précipitation | 186 | 170 | 186 | 183 | 186 | 182 |
| Humidité/Visibilité | 180 | 165 | 179 | 171 | 180 | 177 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1108 | 1105 | 1098 | 1129 | 1104 | 1143 |
| Tmin | 1112 | 1111 | 1099 | 1130 | 1105 | 1138 |
| Durée d’insolation | 186 | 124 | 210 | 279 | 180 | 186 |
| Précipitation | 188 | 190 | 211 | 215 | 210 | 217 |
| Humidité/Visibilité | 182 | 179 | 196 | 200 | 203 | 207 |
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. |
