Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1852 | 1669 | 1851 | 1791 | 1834 | 1791 |
| Tmin | 1857 | 1674 | 1856 | 1793 | 1843 | 1788 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 155 | 141 | 156 | 151 | 155 | 150 |
| Humidity/Visibility | 154 | 138 | 154 | 148 | 153 | 148 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1849 | 1845 | 1790 | 1879 | 1823 | 1899 |
| Tmin | 1857 | 1849 | 1798 | 1882 | 1826 | 1899 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 157 | 157 | 152 | 184 | 181 | 186 |
| Humidity/Visibility | 152 | 151 | 149 | 179 | 172 | 185 |
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. |
