Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 601 | 552 | 606 | 600 | 640 | 625 |
| Tmin | 611 | 557 | 612 | 607 | 640 | 623 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 468 | 423 | 468 | 466 | 491 | 478 |
| Humidity/Visibility | 46 | 47 | 47 | 60 | 71 | 77 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 639 | 639 | 618 | 632 | 601 | 631 |
| Tmin | 638 | 643 | 618 | 638 | 619 | 640 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 502 | 497 | 479 | 495 | 483 | 119 |
| Humidity/Visibility | 76 | 81 | 75 | 74 | 64 | 71 |
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. |
