Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 364 | 329 | 361 | 362 | 385 | 374 |
| Tmin | 360 | 329 | 362 | 372 | 397 | 379 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 139 | 124 | 140 | 155 | 168 | 160 |
| Humidité/Visibilité | 84 | 79 | 84 | 90 | 101 | 101 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 386 | 385 | 377 | 380 | 376 | 371 |
| Tmin | 398 | 393 | 381 | 389 | 375 | 390 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 163 | 170 | 154 | 158 | 166 | 172 |
| Humidité/Visibilité | 108 | 106 | 105 | 104 | 95 | 97 |
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. |
