Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1141 | 1050 | 1147 | 1128 | 1137 | 1106 |
| Tmin | 1128 | 1034 | 1139 | 1105 | 1141 | 1106 |
| Durée d’insolation | 62 | 85 | 124 | 120 | 155 | 60 |
| Précipitation | 177 | 165 | 170 | 175 | 156 | 150 |
| Humidité/Visibilité | 150 | 136 | 126 | 119 | 119 | 115 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1142 | 1158 | 1162 | 1201 | 1139 | 1177 |
| Tmin | 1140 | 1144 | 1132 | 1172 | 1112 | 1175 |
| Durée d’insolation | 124 | 124 | 120 | 124 | 30 | 93 |
| Précipitation | 157 | 177 | 212 | 215 | 212 | 193 |
| Humidité/Visibilité | 119 | 125 | 163 | 176 | 149 | 173 |
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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