Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 293 | 251 | 290 | 300 | 298 | 278 |
| Tmin | 294 | 261 | 288 | 298 | 301 | 288 |
| Durée d’insolation | 44 | 48 | 54 | 71 | 82 | 65 |
| Précipitation | 107 | 88 | 93 | 117 | 130 | 122 |
| Humidité/Visibilité | 79 | 67 | 80 | 95 | 110 | 104 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 294 | 295 | 294 | 294 | 290 | 301 |
| Tmin | 297 | 294 | 294 | 295 | 288 | 305 |
| Durée d’insolation | 72 | 74 | 73 | 55 | 46 | 44 |
| Précipitation | 125 | 132 | 127 | 116 | 92 | 100 |
| Humidité/Visibilité | 107 | 100 | 110 | 103 | 78 | 89 |
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. |
