Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1742 | 1555 | 1720 | 1669 | 1704 | 1655 |
| Tmin | 1748 | 1563 | 1729 | 1670 | 1707 | 1669 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 187 | 170 | 188 | 182 | 188 | 180 |
| Humidity/Visibility | 179 | 158 | 174 | 167 | 168 | 164 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1716 | 1721 | 1691 | 1741 | 1697 | 1753 |
| Tmin | 1729 | 1721 | 1692 | 1749 | 1705 | 1756 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 187 | 192 | 212 | 216 | 212 | 219 |
| Humidity/Visibility | 167 | 170 | 187 | 194 | 204 | 213 |
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. |
