Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 732 | 670 | 735 | 718 | 737 | 708 |
| Tmin | 710 | 644 | 711 | 688 | 709 | 687 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 182 | 169 | 186 | 180 | 184 | 173 |
| Humidity/Visibility | 130 | 123 | 137 | 135 | 134 | 136 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 737 | 714 | 739 | 756 | 746 | 743 |
| Tmin | 709 | 709 | 716 | 725 | 713 | 744 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 188 | 184 | 209 | 206 | 209 | 189 |
| Humidity/Visibility | 142 | 142 | 157 | 153 | 156 | 153 |
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. |
