Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1855 | 1674 | 1848 | 1789 | 1846 | 1786 |
| Tmin | 1848 | 1670 | 1851 | 1796 | 1849 | 1793 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 189 | 174 | 193 | 194 | 198 | 192 |
| Humidity/Visibility | 169 | 151 | 169 | 158 | 164 | 153 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1846 | 1850 | 1818 | 1879 | 1821 | 1880 |
| Tmin | 1858 | 1853 | 1826 | 1877 | 1827 | 1876 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 191 | 190 | 209 | 215 | 210 | 217 |
| Humidity/Visibility | 161 | 169 | 192 | 192 | 189 | 199 |
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. |
