Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1833 | 1628 | 1810 | 1753 | 1794 | 1761 |
| Tmin | 1834 | 1631 | 1808 | 1747 | 1794 | 1761 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 166 | 153 | 176 | 171 | 169 | 177 |
| Humidity/Visibility | 136 | 122 | 137 | 134 | 130 | 142 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1812 | 1836 | 1766 | 1815 | 1766 | 1822 |
| Tmin | 1819 | 1820 | 1761 | 1804 | 1760 | 1814 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 162 | 199 | 187 | 199 | 193 | 204 |
| Humidity/Visibility | 133 | 161 | 158 | 152 | 155 | 163 |
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. |
