Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1093 | 997 | 1086 | 1046 | 1071 | 1046 |
| Tmin | 1098 | 1000 | 1089 | 1046 | 1076 | 1052 |
| Duration of sunshine | 155 | 142 | 186 | 180 | 93 | 240 |
| Precipitation | 170 | 140 | 151 | 154 | 174 | 170 |
| Humidity/Visibility | 157 | 129 | 143 | 148 | 158 | 154 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1084 | 1087 | 1085 | 1128 | 1096 | 1138 |
| Tmin | 1091 | 1095 | 1087 | 1137 | 1100 | 1140 |
| Duration of sunshine | 217 | 217 | 180 | 155 | 120 | 155 |
| Precipitation | 182 | 177 | 198 | 194 | 183 | 197 |
| Humidity/Visibility | 159 | 155 | 179 | 177 | 170 | 183 |
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. |
6th of October