Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1708 | 1563 | 1725 | 1670 | 1727 | 1662 |
| Tmin | 1698 | 1557 | 1724 | 1667 | 1721 | 1655 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 189 | 167 | 188 | 181 | 186 | 177 |
| Humidity/Visibility | 181 | 159 | 179 | 168 | 180 | 163 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1720 | 1725 | 1689 | 1756 | 1700 | 1762 |
| Tmin | 1713 | 1727 | 1692 | 1752 | 1702 | 1759 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 186 | 193 | 215 | 213 | 213 | 220 |
| Humidity/Visibility | 174 | 177 | 200 | 206 | 203 | 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. |
