Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 181 | 166 | 184 | 180 | 182 | 179 |
| Tmin | 185 | 168 | 185 | 179 | 183 | 176 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 186 | 172 | 188 | 183 | 188 | 180 |
| Humidité/Visibilité | 184 | 163 | 184 | 178 | 183 | 176 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 176 | 183 | 204 | 193 | 206 | 209 |
| Tmin | 182 | 186 | 203 | 198 | 208 | 211 |
| Durée d’insolation | 0 | 0 | 0 | 0 | 0 | 0 |
| Précipitation | 186 | 190 | 210 | 200 | 210 | 219 |
| Humidité/Visibilité | 181 | 182 | 205 | 190 | 205 | 210 |
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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