Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 107 | 83 | 86 | 86 | 109 | 109 |
| Tmin | 0 | 0 | 0 | 0 | 0 | 0 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 123 | 113 | 124 | 120 | 119 | 120 |
| Humidité/Visibilité | 97 | 71 | 72 | 63 | 94 | 107 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 119 | 127 | 141 | 138 | 126 | 125 |
| Tmin | 0 | 0 | 0 | 0 | 0 | 0 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 134 | 158 | 153 | 153 | 149 | 151 |
| Humidité/Visibilité | 114 | 125 | 135 | 130 | 125 | 115 |
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. |
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