Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1452 | 1330 | 1461 | 1406 | 1466 | 1414 |
| Tmin | 1422 | 1303 | 1423 | 1400 | 1450 | 1391 |
| Durée d’insolation | 155 | 112 | 186 | 180 | 217 | 240 |
| Précipitation | 190 | 184 | 212 | 204 | 220 | 228 |
| Humidité/Visibilité | 111 | 98 | 102 | 101 | 110 | 107 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1441 | 1409 | 1380 | 1452 | 1409 | 1474 |
| Tmin | 1446 | 1417 | 1386 | 1450 | 1422 | 1461 |
| Durée d’insolation | 186 | 124 | 180 | 279 | 180 | 186 |
| Précipitation | 222 | 218 | 234 | 271 | 266 | 293 |
| Humidité/Visibilité | 104 | 85 | 113 | 124 | 126 | 131 |
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. |
