Number of days available for climatic review
| Parameter | Jan | Feb | Mar | Apr | May | Jun |
| Tmax | 733 | 686 | 752 | 744 | 775 | 767 |
| Tmin | 736 | 690 | 761 | 743 | 776 | 763 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 358 | 325 | 349 | 361 | 389 | 366 |
| Humidity/Visibility | 86 | 77 | 82 | 99 | 112 | 111 |
| Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
| Tmax | 785 | 794 | 744 | 749 | 747 | 817 |
| Tmin | 785 | 791 | 742 | 754 | 742 | 822 |
| Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
| Precipitation | 377 | 378 | 366 | 372 | 382 | 137 |
| Humidity/Visibility | 110 | 117 | 108 | 109 | 101 | 113 |
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. |
