Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1757 | 1590 | 1755 | 1711 | 1769 | 1731 |
| Tmin | 1760 | 1595 | 1762 | 1713 | 1773 | 1732 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 155 | 141 | 156 | 161 | 186 | 180 |
| Humidity/Visibility | 153 | 139 | 153 | 157 | 183 | 178 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1787 | 1786 | 1726 | 1784 | 1734 | 1800 |
| Tmin | 1787 | 1782 | 1734 | 1781 | 1733 | 1804 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 188 | 188 | 180 | 184 | 180 | 186 |
| Humidity/Visibility | 182 | 182 | 177 | 178 | 174 | 184 |
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. |
