Number of days available for climatic review
| Paramètre | jan | fev | mar | avr | mai | juin |
| Tmax | 1063 | 962 | 1075 | 1043 | 1074 | 1030 |
| Tmin | 1075 | 967 | 1072 | 1042 | 1074 | 1043 |
| Durée d’insolation | 135 | 117 | 132 | 123 | 119 | 131 |
| Précipitation | 156 | 140 | 155 | 160 | 161 | 150 |
| Humidité/Visibilité | 144 | 131 | 145 | 137 | 137 | 145 |
| Paramètre | juillet | août | sep | oct | nov | déc |
| Tmax | 1072 | 1096 | 1084 | 1106 | 1069 | 1073 |
| Tmin | 1071 | 1088 | 1089 | 1108 | 1090 | 1075 |
| Durée d’insolation | 137 | 139 | 178 | 154 | 112 | 126 |
| Précipitation | 160 | 193 | 212 | 213 | 198 | 162 |
| Humidité/Visibilité | 143 | 153 | 184 | 182 | 160 | 144 |
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. |
