Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 739 | 668 | 742 | 728 | 772 | 736 |
| Tmin | 684 | 618 | 686 | 661 | 683 | 664 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 496 | 449 | 496 | 502 | 532 | 516 |
| Humidity/Visibility | 60 | 54 | 60 | 70 | 87 | 79 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 764 | 766 | 740 | 765 | 738 | 766 |
| Tmin | 689 | 684 | 664 | 683 | 660 | 685 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 536 | 529 | 516 | 527 | 514 | 103 |
| Humidity/Visibility | 84 | 88 | 81 | 79 | 75 | 85 |
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. |
