Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1769 | 1609 | 1779 | 1722 | 1769 | 1721 |
| Tmin | 1780 | 1617 | 1789 | 1725 | 1777 | 1732 |
| Duration of sunshine | 62 | 57 | 62 | 60 | 124 | 150 |
| Precipitation | 190 | 168 | 190 | 183 | 189 | 181 |
| Humidity/Visibility | 178 | 160 | 179 | 171 | 177 | 171 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1767 | 1783 | 1743 | 1811 | 1746 | 1819 |
| Tmin | 1779 | 1791 | 1746 | 1817 | 1758 | 1818 |
| Duration of sunshine | 155 | 124 | 90 | 93 | 60 | 62 |
| Precipitation | 188 | 189 | 212 | 215 | 212 | 221 |
| Humidity/Visibility | 170 | 179 | 191 | 202 | 197 | 211 |
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. |
