Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1112 | 1011 | 1141 | 1121 | 1129 | 1109 |
| Tmin | 1111 | 1020 | 1144 | 1124 | 1123 | 1120 |
| Durée d’insolation | 62 | 56 | 62 | 90 | 93 | 30 |
| Précipitation | 189 | 175 | 185 | 183 | 191 | 190 |
| Humidité/Visibilité | 132 | 126 | 146 | 144 | 149 | 160 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1163 | 1154 | 1150 | 1171 | 1149 | 1187 |
| Tmin | 1157 | 1154 | 1150 | 1173 | 1150 | 1191 |
| Durée d’insolation | 93 | 93 | 120 | 62 | 90 | 62 |
| Précipitation | 196 | 202 | 225 | 233 | 216 | 234 |
| Humidité/Visibilité | 168 | 161 | 190 | 194 | 185 | 201 |
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. |
