Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 1766 | 1593 | 1767 | 1708 | 1766 | 1710 |
| Tmin | 1767 | 1596 | 1766 | 1707 | 1767 | 1710 |
| Duration of sunshine | 372 | 337 | 371 | 417 | 434 | 389 |
| Precipitation | 155 | 140 | 155 | 151 | 155 | 150 |
| Humidity/Visibility | 154 | 139 | 154 | 149 | 154 | 149 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 1764 | 1763 | 1710 | 1760 | 1708 | 1769 |
| Tmin | 1766 | 1765 | 1709 | 1757 | 1707 | 1768 |
| Duration of sunshine | 403 | 463 | 419 | 361 | 388 | 373 |
| Precipitation | 157 | 157 | 154 | 155 | 150 | 155 |
| Humidity/Visibility | 153 | 151 | 148 | 148 | 148 | 154 |
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. |
