Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1696 | 1529 | 1718 | 1672 | 1709 | 1672 |
| Tmin | 1657 | 1505 | 1665 | 1609 | 1661 | 1642 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 124 | 113 | 147 | 151 | 155 | 150 |
| Humidity/Visibility | 103 | 95 | 116 | 117 | 127 | 129 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1731 | 1724 | 1670 | 1719 | 1665 | 1695 |
| Tmin | 1701 | 1695 | 1643 | 1689 | 1629 | 1691 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 158 | 158 | 150 | 153 | 152 | 129 |
| Humidity/Visibility | 134 | 136 | 130 | 132 | 127 | 121 |
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. |
