Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1192 | 1096 | 1185 | 1154 | 1189 | 1149 |
| Tmin | 1200 | 1114 | 1197 | 1165 | 1199 | 1165 |
| Durée d’insolation | 5 | 11 | 6 | 1 | 4 | 6 |
| Précipitation | 153 | 139 | 153 | 147 | 153 | 146 |
| Humidité/Visibilité | 142 | 128 | 144 | 135 | 143 | 138 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1195 | 1213 | 1185 | 1216 | 1183 | 1224 |
| Tmin | 1202 | 1222 | 1190 | 1217 | 1187 | 1228 |
| Durée d’insolation | 1 | 1 | 1 | 2 | 0 | 7 |
| Précipitation | 151 | 185 | 178 | 171 | 148 | 155 |
| Humidité/Visibilité | 141 | 158 | 166 | 156 | 137 | 146 |
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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