Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 61 | 60 | 59 | 69 | 92 | 90 |
| Tmin | 59 | 56 | 59 | 66 | 90 | 87 |
| Durée d’insolation | 248 | 254 | 248 | 240 | 310 | 240 |
| Précipitation | 117 | 106 | 116 | 114 | 117 | 109 |
| Humidité/Visibilité | 51 | 47 | 50 | 60 | 82 | 78 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 87 | 84 | 90 | 87 | 89 | 93 |
| Tmin | 87 | 82 | 90 | 87 | 89 | 91 |
| Durée d’insolation | 310 | 248 | 270 | 279 | 210 | 248 |
| Précipitation | 111 | 123 | 117 | 125 | 120 | 130 |
| Humidité/Visibilité | 70 | 67 | 72 | 72 | 100 | 70 |
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. |
