Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 37 | 55 | 62 | 59 | 62 | 60 |
| Tmin | 38 | 53 | 61 | 60 | 61 | 58 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 40 | 58 | 64 | 64 | 62 | 64 |
| Humidité/Visibilité | 38 | 55 | 61 | 59 | 61 | 59 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 62 | 61 | 60 | 62 | 57 | 54 |
| Tmin | 62 | 61 | 59 | 61 | 57 | 62 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 63 | 67 | 62 | 66 | 61 | 62 |
| Humidité/Visibilité | 61 | 60 | 59 | 61 | 57 | 60 |
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. |
