Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1633 | 1476 | 1632 | 1598 | 1646 | 1603 |
| Tmin | 1640 | 1482 | 1639 | 1602 | 1648 | 1604 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 156 | 142 | 156 | 172 | 186 | 180 |
| Humidity/Visibility | 153 | 139 | 153 | 167 | 180 | 174 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1656 | 1658 | 1609 | 1655 | 1613 | 1668 |
| Tmin | 1665 | 1663 | 1616 | 1658 | 1618 | 1667 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 187 | 188 | 180 | 184 | 180 | 186 |
| Humidity/Visibility | 180 | 180 | 172 | 177 | 176 | 184 |
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. |
