Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 490 | 433 | 493 | 476 | 492 | 480 |
| Tmin | 493 | 440 | 492 | 477 | 494 | 474 |
| Durée d’insolation | 461 | 385 | 457 | 447 | 493 | 475 |
| Précipitation | 192 | 176 | 203 | 197 | 192 | 186 |
| Humidité/Visibilité | 182 | 157 | 182 | 176 | 183 | 178 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 488 | 495 | 505 | 509 | 488 | 524 |
| Tmin | 490 | 498 | 508 | 516 | 490 | 524 |
| Durée d’insolation | 489 | 465 | 478 | 513 | 459 | 490 |
| Précipitation | 187 | 193 | 210 | 217 | 213 | 219 |
| Humidité/Visibilité | 181 | 183 | 205 | 205 | 206 | 214 |
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. |
