Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1861 | 1668 | 1851 | 1794 | 1850 | 1799 |
| Tmin | 1856 | 1675 | 1847 | 1786 | 1840 | 1788 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 170 | 145 | 178 | 170 | 170 | 153 |
| Humidity/Visibility | 124 | 115 | 126 | 124 | 120 | 114 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1869 | 1861 | 1814 | 1853 | 1798 | 1848 |
| Tmin | 1856 | 1854 | 1801 | 1840 | 1793 | 1846 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 166 | 202 | 202 | 203 | 203 | 217 |
| Humidity/Visibility | 127 | 154 | 149 | 139 | 150 | 150 |
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. |
