Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 556 | 506 | 569 | 571 | 598 | 588 |
| Tmin | 568 | 514 | 578 | 570 | 604 | 589 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 483 | 433 | 476 | 480 | 492 | 479 |
| Humidity/Visibility | 27 | 27 | 42 | 54 | 68 | 69 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 611 | 605 | 587 | 602 | 567 | 581 |
| Tmin | 610 | 606 | 580 | 598 | 570 | 601 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 498 | 496 | 479 | 495 | 486 | 116 |
| Humidity/Visibility | 78 | 72 | 66 | 67 | 50 | 60 |
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. |
