Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1803 | 1645 | 1815 | 1763 | 1808 | 1764 |
| Tmin | 1812 | 1648 | 1823 | 1760 | 1815 | 1764 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 186 | 169 | 187 | 181 | 186 | 180 |
| Humidity/Visibility | 181 | 164 | 180 | 173 | 176 | 172 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1816 | 1824 | 1786 | 1847 | 1794 | 1853 |
| Tmin | 1822 | 1822 | 1792 | 1852 | 1797 | 1858 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 188 | 190 | 210 | 215 | 210 | 217 |
| Humidity/Visibility | 174 | 178 | 196 | 203 | 204 | 214 |
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. |
